Diamond Series Rear Rest Manual

Diamond Series Rear Rest - Introduction

Ransom Rest has been serving the worldwide shooting industry since 1968.
The company’s principal product, the Ransom “Master Series” Rest, has become the worldwide standard for developing handgun accuracy. The United States
government agencies have used it for years to test and develop handguns. We
are justifiably proud of the reputation our products have developed internationally over the years. We pledge to you, our customers, that we
will continue to develop and produce products of high quality and precision.
We believe the Diamond Rifle Rest continues with this quality you have grown to expect from Ransom Rest.

Made in USA

Why a Diamond Series?

Seeing so many copies, clones, or similar rests being made from our patented Rifle Master Bench Rest and noting that most of these are lightweight and inexpensive, we realized that not everyone needs a heavy competition Rifle Master Bench Rest. Many want something lightweight and portable to sight in the rifle or test various loads or accuracy. If you are not a bench rest shooter, you may desire something a little more lightweight, something easy to move and take to the range, something that won’t break the bank. Yet, it has some shiny bling; all the while, it is top quality and precision.

Let’s First Consider Your Rifle

If you are an accuracy enthusiast, benchrest shooter, varmint shooter, or just fascinated by rifles that deliver extreme accuracy, you know that certain things must be done to produce accurate rifles and ammunition.

Time and Money

Consider the large amount of time and money you have invested in creating your custom hunting or match rifles. Additionally, consider how much work it took to develop the ammunition and load you are shooting. Now, two important questions arise:

Certainly, a rest that feeds back vibration into the rifle would adversely affect its accuracy. You must have a rest that remains stable and does not transmit adverse effects.

Accuracy

Many factors are detrimental to accuracy! One of those factors is vibration. There is vibration from the very beginning of the ignition sequence to the exit of the bullet from the barrel. (Generally, those of you who have studied the subject understand these forms of vibration.) As you know, vibration cannot be eliminated, so it must be controlled.

Perfection in Shooting

In our efforts to obtain lighter weight and greater potential for more accurate shooting, Ransom International studied and evaluated many rifle rest options or styles. We measured whether or how well these various designs or styles achieved the result of
a reliable, stable, and accurate shooting platform, diligently working to achieve convenience, friendliness, “portability,” and ease of transport to the bench. The result of our studies is the Diamond
Series Rifle Rest. We believe this rest not only showcases the shiny new-age bling of the twentyfirst century but is also designed to withstand the test of time and can handle even the largest or heaviest calibers you can shoot while maintaining stability and minimizing vibration, all while ensuring repeatability.

Special Features of the Rear Rest:

Not Your Typical Looking Rest

The Diamond Rest looks nice compared with our world-famous bench rest record-holding black Rifle Master.

Appearances do not always showcase the extraordinary elements in design and manufacturing that yield exceptional results. The Ransom Diamond Series features excellent design, meticulous manufacturing, and delivers the aesthetic that modern-day range shooters desire.

Quality and Precision

Only the cap screws and foot pads of the Ransom Diamond Rest are common hardware parts. All other components are specifically designed with carefully selected materials and machined in-house to close tolerances. In short, each part has been designed and manufactured to ensure superior quality for its intended purpose. The Ransom Diamond Series matches the quality of any rifle you will ever fire with it.
Everything is designed to give the rifle enthusiast a safe, accurate, portable, dependable, and trusted tool.

Adaptable

If you are using multiple rifles of different sizes, you may require different plate sizes and bags. The Diamond Series Front and Rear Rest can both be equipped with a Quick Change adaptor and plate, which allows you to easily and quickly change between the bag plates. For the Rear Rest, the QC plates and adaptors are also available for the top of the windage if you want to change between many different bags and plates on top of your windage plate.

Trusted

This product is proudly made in the United States for use here and abroad. We back it with instruction manuals, online video, and phone support. Our goal is to meet or exceed our customer’s needs
and expectations. Check our website for adapters, upgrades, and options for this product. This machine was designed to be as adaptable and adjustable as possible to support the broadest range of firearms. If you have an idea for improvements or changes, please contact us.

Umpire Rear Rest Components

CNC machined base with hand grip hole
Brass knurled Base Leveling knobs (3)
Three Leveling screw pads (3)
For precise leveling and stability of the base. With rubberized pads to prevent scaring of the bench while providing a secure hold. The single leveling screw can also be used for fine elevation up-down adjustment.
Knurled Leveling Screw Lock Rings (3)
For locking the position of Leveling Screw Pads
Windage Adjustable Bag Plate It retains the bag and holds the buttstock of the rifle. Allows for left and right windage adjustment by turning the Red knurled knob. A flex shaft adjustment upgrade is also available. Windage is ambidextrous. Windage QC (Quick Change) can also be added to quickly change between bag plates and bag sizes.
Bag Rails. Position the end plates and allow the bag to be permanently attached to the bag plate.
End Plates Mounted between the Side Rails of the Bag Plate to keep and allow the tension of the Bag against the rifle stock.

Proper Care & Cleaning

The needle elevation bearing is greased from the factory. Normal care and use should not require reapplication. If the bearing is dry, remove red elevation locking knob. Slide the minor column up out of the major column. Remove the bearing and washers. Clean bearing and repack with light grease. Re-install bearing and washer in order on minor column, aligning them so they clear threads. Install minor column in major column. Install red locking knob.
Wipe excess oil from the rest and store in a dry atmosphere.

Notes and Tips

The Diamond Series Rear Rest can be used with our Diamond Series Front Rest or other Rifle Rests, including just a front bag rest.
The Diamond Rest will accommodate all bench rest rifles, as well as most hunting rifles. If your rifle is designed for bench-rest shooting and has a more expansive butt stock. We have a variety of bags and bag plate sizes available for the Rear Rifle Rest, even for BMG Rifles. Visit our website or contact us for more info. Custom bag plates can also be created.
Most rifles use a V bag or a number one bag for the rear rest. A number two or three bag is also available. If your rifle does not fit these or if you desire a better fit, please contact us for special bags, a different style, or a custom style bag.
The Diamond Rest is shipped to support all sporting rifles, target rifles, and other different style rifles. If you are accuracy shooting or competition shooting and desire a custom-made bag for your rifle to get the most out of your Diamond Series Rest, contact us.

To adjust elevation on the Diamond Series Rear Rest. This is done by turning the brass knobs on the leveling screw pads. Typically, the single screw leveling pad will be located in the front, and this is the one you can use for fine elevation adjustment between shots. It is ok to turn the rear rest around and have this located under the shooter’s arm when needing to clear magazines or hand grips on the rifle. But the single elevation screw pad is designed to be located forward for ease of use.
End plates are equipped with nylon-tipped screws to hold position. Do not use screws to
adjust end plates. End plates should be manipulated by hand to squeeze the bag in the
bag plate. Once end plates are in the proper location, snug screws to prevent end plates from relaxing outward. Please note if screws are used to tension end plates directly, the tips can possibly be damaged or destroyed.
Our main goal is to provide a steady and secure rest platform, to ensuring your rifle can be
returned to the same battery position each time.
This rest was designed for competition shooting and staying within the competition guidelines. Some rules or regulations may not allow a rear rest. Contact your sports club and team to verify if rear rests are allowed in your bench rest shooting discipline.

Diamond Series Set Up

What you will need:

You will need:

A 5 /32” Allen wrench
Small funnel and good-grade sand
A block of wood, or wood handle hammer to help shape the bag
A small hammer to help shape the bag

Attaching BAG PLATE to Diamond Series Rifle Rest

The Diamond Series Umpire Rear Rest includes a Windage Adjustable bag plate. However, you can remove it and attach a different Windage Adjustable bag, or we even offer a Windage Quick-Change (QC) Plate. A Windage QC plate allows the use of bags and bag plates of various sizes.

Filling Bag to be Mounted

Each Ransom Diamond Series Rifle Rest requires a bag to be attached to the bag plate. We recommend filling the bag with fine-grain sand. Black sand is the most preferred; it is the heaviest in nature and is known for its excellent vibration-deadening properties.
You want the bag to be relatively firm, but a firm bag is difficult to mount for the first time. It is best to underfill the bag for mounting for the first time.
Then, shape the bag, remove it, and refill it so it is relatively firm for use. This can take a couple of times to shape and break in your bag. The bag has a fill flap located under the bag. Flip the bag upside down, and you should see the fill flap tucked on one end underneath. Using the small 5/32” Allen wrench, you can untuck the fill flap. Then, to fill the bag, a large rifle cartridge with the head cut off works well to open the orifice and fill the bag. Put the case all the way into the fill flap and, using a small funnel, fill the bag compartment. Remove the cartridge case once the compartment is filled, and tuck the flap back in. Tucking the fap can be made easier by wetting it or applying a little die wax to the leather. If needed.

How to Mount a Bag on Your Rear Rest

Mounting the Bag on the Bag Plate:

The Bag mounts in the same manner as all bag plates offered by Ransom Rest.
Instructions to Disassemble Bag Ears/End Plates:
Loosen bag ears/end plates on the machine. You should not need to remove the ears, but you do need them loosened.
Back off the red thumb adjuster screw on the bag ear/end plate.
If the bag ear adjuster screw is removed, please note it goes in the bag ear/end plate at an angle. Do not cross thread when starting this screw.
Once the ear has been loosened slightly, remove the 8 bag-rail screws located on both sides of the top bag plate.
There are four 10-32 SHCS (socket head cap screws) located through each bag rail. Remove all 8 screws and remove rails and end plates as a unit. This step can save time.

Filling Bags with Sand

Fill the bag with good grade sand. Most prefer a high-density small grain black sand. You can use a fine grade brown sand or a good fine-grade aquarium sand. Most competition and bench rest shooters prefer and require the black sand and find it the best vibration deadening sand.
There is a tab located under the bag at one end. The tab will be tucked into a pocket. Remove tab from the pocket. A Phillips head screwdriver will help remove the tab and open the hole in the tab to accept funnel.
Untuck the tab, use a small funnel and fill the bag to your preferred consistency. Please note an overfull bag will be very difficult or impossible to mount.
Once the bag is full, tuck the fill tab back in and place it on the flat bag plate, in the center.

Mounting Full Bag

Verify the 4 tangs or tabs on the bag will be in between the bag rail screws. These 4 tabs run under the rails to hold the bag in place.
Gently lower the rail and end plate assembly over the bag into position. with the 4 leather tabs under the rails. An overfilled bag is difficult to
mount, so it’s best to have the bag under full for the first time mounting.
If the bag is filled properly, it will require a bit of effort to move the sand in the bag to fit between the Side Rails and align the screws. Like a baseball glove, you are trying to get a nice, tight, even fit.
Gently start all 8 SHCS (socket head cap screws) Start all threads carefully by hand.
Once all screws have been installed loosely, slowly tighten all 8 screws in a star pattern or a crisscross pattern. To evenly snug rails and not
bind the end plates. Make sure soft tip screws on the end plate are clear and do not interfere as this will ruin the tips or bend the screws during
tightening.
Gently, work all screws down equally as not to cant or twist the assembly or bag end plates.
Once the bag rails are fully snug and torqued down equally, you can use the wood block or wood-handled hammer to start forming your bag into the shape preferred for your rifle’s butt stock.
Using a wood block and hammer to adjust the bag, a #3 bag can be manipulated to a flat bottom 2.75” to 3″ width.
You can also shape the bottom of the bag if your rifle is not flat bottom. You can use an appropriate size round wood block or wood dowel to do this. Sometimes, a round wood-handled hammer can also work.
If you need to soften or weather proof the leather, we recommend Obenauf’s conditioner.
In some cases, you may need to remove or add sand until the bag is the shape you require so the end plates/bag ears function properly.

SETUP AT THE RANGE

Set your Ransom Diamond Series Rear Rest on the
shooting bench with the two leveling feet towards
your shoulder position. And one leveling foot pad away from you. This positions the front knob under the trigger guard area, so it is easy to make fine up-down adjustments with your assist hand. The rest can be used either way but having the single knob forward aids in up-down elevation adjustments.
Loosen the base-leveling-screw lock rings to level the feet or align the base as needed.
Turn the brass knurled knob base leveling screws until the base is level or in line with the target or table as needed. Then, tighten the base leveling screw lock rings for rigidity.
Adjust End Plates, to firmly grip the rifle butt stock. Do not to use the soft tip screws to add tension to the end plates. It is best for you to squeeze by hand the end plates to add tension to the bag, then adjust the screw to keep that tension.
You can adjust the Windage Left and right adjustment from the windage bag plate.
Fine-tuning left and right to the acquired target or adjusting windage between shots is done with the Red Windage knob. This knob can be reversed by unmounting and remounting the windage bag plate.
For most ridged results make sure all leveling screws and knobs are tight before firing.
Once the Diamond Rest is fully adjusted and fits the rifle butt stock snugly, fire a few settling rounds and recheck all adjustments. Ensure the rifle is on target. Pay attention to returning the rifle to the same position each time.
Fine elevation adjustments can be done by the single brass knob on the leveling pad. Windage from left to right is done by the red knob.

Bags

Bags Available

Front Bag Available in Regular #1, Medium #2, or Wide #3.
All standard bag base size is 2 1/4″ W x 5 3/4″ L x 1″ H

#1 bag measures approximately 1-1/2″ – 1-3/4″ in between the ears

#2 bag measures approximately 2″ – 2-1/2″ in between the ears

#3 bag measures approximately 2-3/4″ – 3″ in between the ears.

5″ bags are custom made from Protektor Model to fit your rifle we do not stock the 5″ bags they are specific to each rifle stock. Contact Protektor Model for custom bags.

V Bags

The Rear Rest V Bag is used for most sporting rifles or thin butt stocks 1” or smaller.

Available Rear Bags

Rear Bag Available in Bunny or Rabbit-Ear Styles.

Rear bags for Rifle Master Rear Rest are available from Protektor Model bag
– www.protektormodel.com

Accessories

Quick change adapter and plate

Any of the Diamond Series and bag plate choices can be fitted with the optional Quick-Change adapter. The optional Quick-Change Plate mounted on the Diamond Series allows a quick change for those who need to change the bag plate sizes or the bags often for different rifles. With the optional Quick-Change Plate mounted on the Diamond Series this allows a quick change for those who need to often change the bag plate sizes or the bags, for different rifles. This will allow you to change out your bag plates in just minutes, without affecting your bag adjustments or fit for your rifle.

Windage Quick Change Adapter and Rails

If you have a windage upgrade on your Diamond Series, The QC adapter and rails will allow you to quickly change between rifle bag plates on top of your windage. This QC will allow you to change out your bag plates on your windage in just minutes, without affecting your bag adjustments or fit for your rifle or removing your windage.

Various Bag Plate Options

The Ransom Diamond Series Umpire Rear Rest offers different bagplate options, and with a Quick-Change option, they can be quickly and easily interchanged depending on shooting requirements.

The Standard Windage Bag Plate is 3” x 6” this represents a sure and steady rest for the rifle’s butt stock, suitable for the most demanding shooting. If you ever need a wider bag plate we also offer a 3” x 7”, 3” x 8”.

Other bag plates usually used on front but can be used on rear include 5” x 6”, 5” x 7”, 5” x 8”, and 5 x 8 1/2, representing more surface area front to back, allowing a little more sure and steady rest for the heavy gun and rifles, suitable for the most demanding shooting. Of heavier, larger, or bigger stocks. These plates require custom bags.

Optional Brass Tip Thumb Screws

Brass head with Standard tip screw for the Quick-Change or Brass head with soft tip screw for the bag ears.

Accessories (Continued)

Windage Adjustable Bag Plate

The Windage Adjustable Bag Plate is included with the Diamond Series Rear Umpire Rest. When the Diamond Series was designed, the necessary fine left-right-up-down adjustments between shots were made at the rear.
These fine adjustments can be easily made with the Diamond Series Rear Umpire Rest. The windage holds securely between shots and facilitates easy left-right adjustments.
The windage features clear graduation lines for scaling your movement. It is entirely ambidextrous. A total of 1″ adjustment is available, with 1/2″ to the left and 1/2″ to the right at the bench. There are two set screws on the windage. This adds tension to a Teflon slide, eliminating any slop. No adjustment is needed for these screws; they just prevent wiggling during the left-right adjustment. These set screws should not be tightened; they should only be snug to provide drag on the Teflon slide.

Over-tightening will cause the windage to lock. The windage is its own bag plate. A Windage QC adapter and rails can be added to allow many bag plate options on top of the windage.

For any questions regarding windages add on or input feel free to contact us directly.

Front Diamond Series Rests are Also Available

SAFETY WITH FIREARMS IS YOUR RESPONSIBILITY

Be Careful!

We guarantee the exercise of reasonable care in manufacturing, but assume no further responsibility.

Be sure to check our website frequently for sales and new products. All Ransom products can be purchased direct from Ransom International.

RANSOM MASTER SERIES WARRANTY

Ransom Master Series are warranted against defective parts and or defective craftsmanship for a period of One (1) year. After one year Ransom Rest is still fully backed and supported just email or call us for any questions or support needed.