God Bless Our Republic
~ Lexington and Concord ~
~ April 19, 1775 ~
~ Comments? Send Lance an Email ~
TriggerShims
Remington Gun Shims
Rebellion Against Tyrants is Obedience to God
~ Benjamin Franklin ~
Manufacturer of
Trigger Shims Brand
American Made Gun Shims
- Home of -
TriggerShims.com
GunShims.com
ShivelySales.com
MichiganCenterOutdoors
SmallShims.com
Gun ShimsGun Smith Supplies
Since 2008
WWG1WGA
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
in
Michigan Center, Michigan
"Better to be poor and honest than to be dishonest and rich." Proverbs 28:6
God Bless the U.S.A.
American Made Gun Shims for Remington
God Bless America
Remington Rifles
and Shotguns
Remington Rimfire Bolt Shims
Also see our Uberti Remington Page
~ Quick Links to Items on This Page ~
Remington 40X Bolt ShimsRemington 5 Bolt Shims
Remington 540X Bolt Shims
Remington 504T Bolt Shims
Remington 513T Bolt Shims
TECH TIP: Bolt Shim Instructions ~ A General Guide
TECH TIP VIDEO: REM 40X Bolt Shims
Remington Shotgun Shims and Parts
Remington Rifle Gun Springs
Remington Model 40X Bolt Shims
Remington Model 40X Small-Bore Target Rifle Bolt Shims
The Remington Model 40X Small-Bore Target Rifle was introduced in 1955 and chambered for the .22 Caliber Long Rifle Cartridge
Bolt Shims for 1950’s Vintage Remington 40X Target Rifles that were also sold at CMP up through 2010+
Also may fit other models, check your bolt size to confirm
Rem 40X Bolt Shim ~ .570" X .690"
How does a 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 tight against the breech. If the bolt is not up tight against the breech it tends to cause misfires and light strikes.
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. Excessive headspace causes the bolt to feel loose.
When searching for Accuracy, ~or~ If you are getting misfires and light strikes shimming the bolt is a good way to solve it.
Remington 40X Bolt Shim 4 Pak include;
1 X .002" - 1 x .003" - 1 X .004" and 1 X .005"
Total of .014" potential adjustment so you will be assured
to have more than needed to adjust one rifle.
NOTE: Be Advised this bolt may have taper pins that must be pressed out in the right direction.
I have found they also have straight pins that are 5/64" Diameter
~ Click Here for Rem 40XB Parts and Diagram ~
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 - $7.50 *Specify your size in Box Below .0015" or .002" - .007"
- You can Request Your Own Assortment Thicknesses In Box Below
- Includes Free ~ First Class Mail Economy Shipping
.570" X .690" Remington 40X Bolt Shims
Item # SS-REM40X/BS
Click Box to Choose Different Quantities
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
👉Link To: INTERNATIONAL TERMS / POSTAGE $1
Special Thanks to Tim for Field-Testing and Photo's
TECH TIP VIDEO: Remington 40XB with TriggerShims.com Bolt Shims
Remington Model 540X Bolt Shims
Remington Model 540X Small-Bore Target Rifle Bolt Shims
Also Fits Remington 541T
Fits all 540 / 541 Series
Should Also Fit Remington 580 581 582
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 - $7.50 *Specify your size in Box Below .0015" or .002" - .007"
- You can Request Your Own Assortment Thicknesses In Box Below
- Includes Free ~ First Class Mail Economy Shipping
.357 X .595 Remington 540X Bolt Shims
Item # SS-REM540X/BS
Click Box to Choose Different Quantities
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
👉Link To: INTERNATIONAL TERMS / POSTAGE $1
The Bolt Assembly Pin is KNURLED on one end, and would require great care to disassemble. After disassembly, you would want to locate a split pin available from a hardware store, cut to the correct length and sanded down on the OD so it just fits with hand pressure for shim testing.
Replacement Bolt Assembly Pin Pictured Product # 707620C available at Numrich Gun Parts Corp
Remington Model 504T Bolt Shims
Remington Model 504 and 504T
Small-Bore Target Rifle Bolt Shims
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 - $7.50 *Specify your size in Box Below .0015" or .002" - .007"
- You can Request Your Own Assortment Thicknesses In Box Below
- Includes Free ~ First Class Mail Economy Shipping
.450 X .595 Remington 504T Bolt Shims
Item # SS-REM504T/BS
Click Box to Choose Different Quantities
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
Remington Model 513T Bolt Shims
Remington Model 513 and 513T
Remington 521 and 521T
Small-Bore Target Rifle Bolt Shims
Grandpa's Notebook: Customer Tech Tip Video
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 - $7.50 *Specify your size in Box Below .0015" or .002" - .007"
- You can Request Your Own Assortment Thicknesses In Box Below
- Includes Free ~ First Class Mail Economy Shipping
.480 X .570 Remington 513T Bolt Shims
Item # SS-REM513T/BS
Click Box to Choose Different Quantities
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
👉Link To: INTERNATIONAL TERMS / POSTAGE $1
Thanks TriggerShims Field Tester Todd Moody for his help on this shim
Remington Model 5 Bolt Shims
Remington Model 5
.22 Rifle Bolt Shims
Remington Model 5 manufactured in Serbia by Zastava Arms
Model 5 also sold under Interarms and Charles Daly
Fits:
Zastava CZ99 and/or MP22 (depends when made)
Remington Model 5
Charles Daly MP22
These Shims Measure .442" X .555"
Fits Bolt Size .433" X .590" plus/minus .005"
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 - $7.50 *Specify your size in Box Below .0015" or .002" - .007"
- You can Request Your Own Assortment Thicknesses In Box Below
- Includes Free ~ First Class Mail Economy Shipping
.442 X .555 Remington 5 Bolt Shims
Item # SS-REM5/BS
Click Box to Choose Different Quantities
👉Link To: ADD USPS TRACKING UPGRADE with SHIPPING PROTECTION
Remington 5
Bolt Shim Instructions
Bolt Shim Instructions
LANCE'S TECH TIP:
Rimfire Bolt Shim Installation
~ A General Guide ~
Rimmed Cartridges use the thickness of the cartridge rim for head-spacing.
.22 Rimfire Cartridges Headspace on the Case Rim.
The Actual Headspace is in the Recessed Face of the Bolt.
You Must Make Sure this Recessed Bolt Face is Equal To or Deeper Than You Rim for Safety
Generally Speaking there is extra room left in production guns between the Bolt and Breech to accommodate a wide variety of ammunition with varying rim thicknesses
You should first measure the depth of your bolt face pocket to insure it meets SAAMI Headspace minimum depth.
Shimming between the two bolt halves ensures the bolt is seating the cartridge up gently against the breech with your chosen brand of ammunition.
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.
If the bolt closes slightly tight, it is best to back up one step, remove .001"
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, while maintaining proper headspace. 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?
If you have any question, use a headspace gauge to check for proper headspace.
Bolt Shims have in many instances cured light strikes.
Will they help with Accuracy? Don't take my word for it,
Read our 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
Click Here for ~ Everything You Need To Know About Headspace from Kurt the Gunsmith
V1/2025
Rimfire Rifle Bolt Shim Index
BoltShim-INDEX 9/24
Our Ever Expanding Selection of Rimfire Rifle Bolt Shims
Links to Our List of .22 Rifle Bolt and Barrel Shims
- Anschutz 54 ~ Now In Stock!
- Bergara B-14R Rimfire Bolt Shims
- CZ and BRNO Rimfire Bolt Shims
- CZ 457 Rimfire Bolt Shims
- Kimber 82G Target Rifle Bolt Shims
- Lithgow LA 101 and SA 2020 Rimfire
- Marlin 80 / 983 Rimfire Bolt Shims
- Mossberg 44 U.S. Bolt
- Mossberg 144 LSB Bolt
- Remington 5 Bolt Shims
- Remington 40X Bolt Shims
- Remington 504T Bolt Shims
- Remington 513T / 521T Rimfire Rifle
- Remington 540X Bolt Shims
- Ruger American Rimfire Bolt Shims
- Ruger 77/17 77/22 Bolt Shims
- Savage BMag Bolt Shims
- Savage MKII Bolt Shims - Prototype
- Springfield Armory Model 2020 Rimfire
- Suhl 150 Rimfire Rifle
- Tikka T1x and Sako P72 / M78 Rimfire Rifle / Walther KK300
- Walther KK500 Rimfire Bolt Shims
- Winchester 43 and 52 Bolt Shims
- Winchester 69 and 75 Bolt Shims
- CZ 455/457 Barrel Shims
- CZ 455/457 XL Barrel Shims
- 10/22 Barrel Shims
- 2500X and Trident Barrel Shims
- 3/4" Shank Bull Barrel Shims
~ Barrel Shims ~
NOTE: email me to be put on a list to Request a New Bolt Shim ~ Send Lance an Email ~
Unsolicited Testimonial:
Just a friendly note on the bolt shims I purchased and installed. My 5 shot group went from dime size at 50 yds to everyone touching and not being able to count individual holes.
Thank You for a Great Product ~ Riley in WV
Unsolicited Testimonial:
Lance,
I simply wanted to say thank you for providing Bolt Shims. My first one installed was on my Bergara B-14 22 Trainer. I won the club season matches in 2022. It's more accurate now than my winning season. After seeing an improvement, in an already accurate rifle, I've shimmed my Bergara Shooting Rimfire barreled action, two CZ 457, my 2020 Springfield, and my my 54 Annie. The Anschutz allowed for 5th place in the IR 50/50 factory class last year. I shimmed it yesterday. The common fliers were less frequent and overall consistency was improved. A noticeable improvement was seen in all the rifles.
Thanks again for offering a great product ~ Rob in NC
Remington Shotgun Shims and Parts
Remington 870 / 1100 Trigger Shims
.156" X .310"
Trigger Shim Pak Assortments BELOW are as follows;
2 Pak comes in .002"
4 Pak comes with 2 each .002" and .003"
6 Pak comes with 2 each .002", .003" and .004"
8 Pak comes with 2 each .002", .003", .004" and .005"
12 Pak comes with 4 each .002", .003", .004"
20 Pak comes with 4 each .002", .003". .004", .005" and .006"
24 Pak comes with 6 each .002", .003", .004" and .005"
30 Pak Gunsmith Special Assortment comes with 6 each .002", .003", .004", .005" and .006"
-OR-
Choose ANY Pak and Specify Your Requested Thickness in Comment Box
Available in Stainless Steel ~ .002" - .009" Thickness
Remington Rifle Gun Springs
Remington 700 Rifle
Reduced Power Trigger Spring
Trigger Spring for Remington 700 Only -
Reduced Power - Improved let-off and trigger pull.
Long and Short Actions
Stock No. 33240........8.95 Free USA Only Shipping
Remington Rifle Extra Power Ejector Spring
700, 721 and 722 Series
Stock No. 33243........8.95 Free USA Only Shipping
Wolff Blitzschnell Speed-Lock Striker Springs for
Remington Bolt Action Rifles - Extra Power
700, 721 and 725 Long and Short Actions
Note: Factory Standard Spring Weight is #24
Our Extra Power Springs are #28 - The Most Popular Weight
Note: 40X Centerfire use No. 63428
Stock No. 63428 Short Action #28 ..........$14.95 Free USA Only Shipping
Stock No. 63528 Long Action #28 ..........$14.95 Free USA Only Shipping
UPGRADE FROM FREE ECONONY SHIPPING ~to~ SHIM TRACKING w/ SHIPPING PROTECTION #ESU
~ SHIMS ONLY ~
~ $5.00 U.S. Tracking UPGRADE ~
NOW Includes
~ SHIPPING PROTECTION* ~
~ USA ONLY ~
Upgrade from FREE ECONOMY MAIL to
Bubble Pak w/ Tracking
(Shims Only) Orders - Add TRACKING $5.00 - USA ONLY
Shim orders DO NOT include Tracking!
THIS IS FOR SHIMS - ALL OTHER ORDERS Include Tracking
~Click the ADD TO CART button below ANYTIME BEFORE WE SHIP SHIMS~
Continental USA, AK & HI ONLY
* USPS Ground Advantage™ Service
* Replacement for items lost or damaged during shipping
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
"American Made Gun Shims" - GunShims.com - TriggerShims.com
and
TriggerShims is a Trademark
of
Shively Sales
Michigan Center, Michigan
All Material Copyright of Lance Shively
2008 ~ 2025
BY PURCHASING SHIVELY SALES PRODUCTS
YOU ASSUME ALL RESPONSIBILITY FOR THEIR SAFE INSTALLATION AND USAGE.
YOU RETAIN ANY AND ALL RESPONSIBILITY FOR YOUR OWN ACTIONS. Be Safe!!
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 Webmaster@TriggerShims.com
Republic.... I like the sound of the word. It means people can live free, talk free, go or come, buy or sell, be drunk or sober, however they choose. Some words give you a feeling. Republic is one of those words that makes me tight in the throat - the same tightness a man gets when his baby takes his first step or his first baby shaves and makes his first sound as a man. Some words can give you a feeling that makes your heart warm. Republic is one of those words. - John Wayne in the Alamo