Knowledgebase

6-screw Bases, How NOT To Do It

6-screw Bases, How NOT To Do It

As you can clearly see from the pix below, this new custom Encore barrel put out by one of the big name shops clearly demonstrates that you cannot use the normal 6-screw spacing on tapered barrels. Here you can see a stainless plug screw backed out to the same plane as the straight shank of […]
Secure Scope Base Mounting

Secure Scope Base Mounting

If finger tip pressure on a scope base overhanging the taper on a barrel moves the base up and down, stop and think what happens to your scope and rear scope ring during recoil. Take the flexing out of the base for more secure scope mounting and less strain on your scope and scope rings. […]
Precision Recrowning

Precision Recrowning

Much of the time factory and even a lot of “custom” crowns are cut off center and/or out of square with the bore. There are other ways to go about it, but this is the best I have come up with in the last 34 years. All too frequently, bores are not centered at the […]
Pillar Bedding Forends for best accuracy

Pillar Bedding Forends for best accuracy

Pillar Bedding Forends for best accuracy. As barrels heat up during firing, they move causing small but very significant changes in their points of contact in the forend barrel channel. These changes in contact effect the barrel’s vibration patterns and thus where the bullet will impact the target from one shot to the next. It […]
Sims Barrel De-Resonator tests

Sims Barrel De-Resonator tests

In quest of good information and not a condemnation of the device, here is a report of one man’s tests of the Sims Barrel De-Resonator. Foreword by Mike Bellm. What we are after is a fix for problem barrels that exhibit poor accuracy. If barrel harmonics can be eliminated in the process of finding the […]
Headspace, How to get it right.

Headspace, How to get it right.

This Page Can Save You Thousands of Dollars! Correct headspace is essential to accuracy, reliable functioning, and good case life. Here is how you measure it, make corrections, and also measure throat length. The first thing you must do is understand that headspace is not a length, which flies in the face of the industry […]
More Chamber Misalignment

More Chamber Misalignment

This is what you guys are up against when you buy a barrel or have a barrel rechambered. It is not about finding fault, it is about educating shooters and getting the performance from the TC guns that they deserve. It is also about shooting sports in general and fair play. When you buy a […]

You cannot depend on factory ammo

It is blind foolishness to expect all ammo to meet specs and produce correct headspace. Here is a perfect example. Take the measurements and you will KNOW what the headspace is, then make corrections. This gentleman complained he could not cock the hammer with a loaded .280 Rem. barrel and wondered why. Taking a few […]

Bellm Triad cartridge

Bellm cartridges based on the .308 Winchester case body and .444 Marlin brass to both correct factory chamber misalignment and increase performance from the Thompson Center Contender and G2 firearms using common, standard reloading dies for easy, economical case forming and loading. Custom chambers without the cost of custom dies! Bellm cartridges in 7mm, .308, […]
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