Thank You!
Tammy and I
Sincerely Appreciate Your Patronage

God Bless the U.S.A.

Email Questions To: Lance at TriggerShims

Watching From Above

~Ollie's Links~

September Take a Kid Shooting

September is TriggerShims
Take a Kid Shooting Month

“Children Should be Educated and Instructed in the Principles of Freedom.” ~ John Adams (1787)

Go afield with a good attitude, with respect for the wildlife you hunt and for the forest and fields in which you walk. Immerse yourself in the outdoor experience.
It will cleanse your soul and make you a better person ~ Fred Bear

Bergara Rimfire Rifle Shims

TriggerShims Logo TriggerShims Logo

Whoever Would Overthrow the Liberty of a Nation
Must Begin by Subduing the Freeness of Speech
~ Benjamin Franklin ~

Manufacturer of
Trigger Shims Brand
American Made Gun Shims
- Home of -

Gun Shims
Gun Smith Supplies
Since 2008

We Manufacture the Widest Selection of Gun Shims to be Found Anywhere on the Planet

100% American Family Owned

Shively Sales - Manufacturer of
TriggerShims Brand
Gun Shims
Michigan Center, Michigan

"Better to be poor and honest than to be dishonest and rich." Proverbs 28:6

Contact Us

~ Send Lance an Email ~

Waving American Flag

God Bless the U.S.A.

American Made Gun Shims

Bergara B-14 R Rimfire Rifles

Bolt Shims

New at
Bergara B14-R Bolt Shims

Bergara B-14R Rimfire

~NEW~ Bergara B 14R Rimfire Bolt Shims

The Bergara B14-R's two-piece bolt features a spacer/shim that sets the rifle's headspace. TriggerShims offers a spacer kit that will allow headspace adjustment in 0.001 increments.

Bergara B-14 R Bolt Shims

.001" shims are too thin/delicate to be practical. In my opinion, proper clearance is .001" and if a .002" shim is too tight, no shim is needed.

Bergara B-14 R Bolt Shim

These are the Original TriggerShims Brand B-14 R Bolt Shims
A 4 Pak should do most any gun, Order multiple Paks for Multiple Guns and Save $$

How does a Rimfire Bolt Shim work? The actual head space is in the recessed face of the bolt. Shimming between the two bolt halves ensures the bolt is up snug against the breech. If the bolt has excessive clearance at the breech it can to cause misfires and light strikes, or simply inconsistent accuracy. When a Production Rifle is assembled, a bit of extra room or excess tolerance can be left, and this slight variable can affect accuracy. When the bolt action rifle’s bolt locking surfaces become worn increases in the headspace can cause light firing pin strikes, poor ignition (misfires), looseness of the bolt, and loss of accuracy.
Proper Adjustment of the Bolt / Breech with Our Shims may Increase Accuracy

TriggerShims Bolt Shims come in the following assortments, Buy Multiple Paks and Save $

NEW 5 Piece Kits ~ Include .0015" Shims for Finer Adjustment

  • 4 Pak Assortment - $11 includes 1 each .002", .003", .004" and .005"
  • 5 Pak Assortment - $14 includes 1 each .0015", .002", .003", .004" and .005"
  • Use Drop-Down V and Buy 2X Double or 3X Triple Pak and Save $
  • 2 Shim Pak - $7  *Specify your size in Box Below .0015" or .002" - .010"
  • You can Request Your Own Assortment Thicknesses In Box Below
  • Includes Free ~ First Class Mail Economy Shipping

Bergara Shim ~ .499" X .649"

Item # SS-B-14R/BS Bolt Shim Pak

TECH TIP: Bolt Shim Instructions ~ A General Guide

- price includes Free Economy Shipping - USA and International

Bergara B-14 R Bolt Shim Pak
Choose Assortment Shim Pak
Enter Choice / Request Below

Thanks to TriggerShims Field Tester Tony in KY for asking for these shims

NRA Review: Bergara B-14R

Bolt Shim Instructions
Bolt Shim Instructions
TriggerShims Snek

Rimfire Bolt Shim Installation
~ A General Guide ~

Rimmed Cartridges use the thickness of the cartridge rim for head-spacing .22 Rimfires Headspace on the Case Rim, and the actual head space is in the recessed face of the bolt.
Shimming between the two bolt halves ensures the bolt is up gently tight against the breech.
You can use our color coded numbered shims like a gauge to find the when the bolt face touches the barrel breech face, and then calculate where you want to be with your bolt headspace depth and rim thickness measurements.
I cannot tell you which shim best works with your rifle, you decide that yourself by fitting and feel and by shooting.
Installing Bolt Shims requires fitting by hand, and checking with the Bolt installed in the Rifle, and Locked Down - you do not measure with the Bolt out of the Rifle.
To establish the Bolt/Breech fit, shims are installed and fitted on an empty chamber.
If possible it may give you a better feel if you leave the extractors off some rifles while fitting shims.
Start with a 4 or 5 Pak of shims, install the .0015" or .002" thinnest shim and see how your bolt closes, if it seems to close as normal, then continue to install each thicker shim until the bolt starts to close harder than normal. At the point where your bolt begins to close hard, that was the amount of slack that was in your bolt, measured by whatever shim or shims combined were needed to bring the bolt up tight to the breech. Now it is best to remove that shim, and step back one number, example would be if a .005" Red shim causes the bolt handle to close harder than normal, then take it out and install a .004" Purple.
If you have to force or put undue stress on your bolt to close it, you should reduce the number of shims. You will generally only use 1 of the 4 or 5 shims in the package, but you can stack shims together if needed. When you have the correct shim installed, your bolt should close normally or just (ever-so) slightly tighter than normal. Put a very small drop of oil on the shim. Now you can go to the range and with the barrel pointed in a safe direction, once again check fit with your favorite ammo.
Due to variations in rim thickness, you may have to reduce the thickness of shims, remember you have already removed all the excess headspace from the bolt/breech, so now the only thing to do is remove thickness (shims) if / as needed to get to your sweet spot or required headspace for the rim thickness of your favorite cartridge.
For Longest Shim Life use a drop of oil or a (very small amount of) grease on your shim.
If you have to force or put undue stress on your bolt to close it, you should reduce the number of shims. A minimum of clearance should be maintained, do not put undue stress on the bolt by shimming too tightly as it is unnecessary!
At no time do you want to force the bolt to close, did I explain that clearly?
Bolt Shims have in many instances cured light strikes. Will they help with Accuracy? Don't take my word for it, Read our the Customer Reviews or ask our Customers
Simply Chambering More Consistently Yields More Consistent Results.
Your Satisfaction is Guaranteed, if you feel you receive no benefit you may send your shims back for a Full Refund.

TriggerShims Bolt Shim Instructions Copyright June/2023

TriggerShims Snek

Rimfire Rifle Bolt Shim Index


Expanded Selection of Rimfire Rifle Bolt Shims for 2023

Links to Our Growing List of .22 Rifle Bolt Shims

  1. Anschutz 54 ~ Now In Stock!
  2. Australian Lithgow LA 101 / SA 2020 Rimfire
  3. Bergara B-14R Rimfire Bolt Shims
  4. CZ / BRNO Rimfire Bolt Shims
  5. CZ 457 Rimfire Bolt Shims
  6. Kimber 82G Target Rifle Bolt Shims
  7. Marlin 80 / 983 Rimfire Bolt Shims
  8. Mossberg 44 U.S. Bolt
  9. Mossberg 144 LSB Bolt
  10. Remington 40X Bolt Shims
  11. Remington 504T Bolt Shims
  12. Remington 513T / 521T Rimfire Rifle
  13. Remington 540X Bolt Shims
  14. Ruger American Rimfire Bolt Shims
  15. Ruger 77/17 77/22 Bolt Shims
  16. Savage BMag Bolt Shims - Coming May 2023
  17. Savage MKII Bolt Shims - Prototype
  18. Suhl 150 Rimfire Rifle
  19. Tikka T1x and Sako P72 / M78 Rimfire Rifle
  20. Walther KK500 Rimfire Bolt Shims
  21. Winchester 52 Bolt Shims
  22. Winchester 75S Bolt Shims
  23. New for 2023
    ~ Barrel Shims ~

  24. CZ 455/457 Barrel Shims
  25. 10/22 Barrel Shims
  26. 2500X and Trident Barrel Shims
  27. NOTE: email me to be put on a list to be notified when new Bolt Shims are ready ~ Send Lance an Email ~

“I predict future happiness for Americans, if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.” ~ Thomas Jefferson



(Shims Only) Orders - Add USPS TRACKING $4 - USA ONLY

MOST Shim orders under $50 DO NOT include Tracking and are sent in a
White Business Mail Envelope - Orders OVER $50 Include Free Tracking
You can Upgrade to USPS Mail Tracking on your SHIM ORDER for $4.00
This Upgrade includes a 6X9 Bubble Pak Mailer and USPS Tracking
(increases have driven our cost for Shipping and Packaging to almost $5)

~Click the ADD TO CART button below to ADD USPS Tracking to your Shim Order

Enter Special Notes Below

~Click Here~ for PRIORITY Mail

We Cheerfully accept Cash, Money Order, and Credit Cards through our Secure PayPal Check-Out

All Website Orders are Shipped the Next Business Day

I will Ship Shims to USA, Canada and International

Gun Parts Shipped to USA Only

PayPal ChargeCard Picture.gif

"American Made Gun Shims" - -
TriggerShims is a Trademark
Shively Sales
Michigan Center, Michigan

Copyright 2008 ~ 2022

God Bless and Make America Great Again!


If you have any questions or safety concerns, see a qualified Gunsmith.

I manage this site myself, Please Report Any Website Problems to;
Lance at

“We can’t go home again because of the change in it and in ourselves, but it’s still home, still part of us....
And that’s a beautiful thought.”
~ Thomas Wolfe