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This is part one of two on the 280 AI. You will learn the difference between the Ackley 40 degree shoulder and long sloping shoulders. How to measu...

280 AI Part 2, keys to understanding the difference between the Ackley Improved cartridges and their parent cartridge. Learn to use our Headspace I...

Basics to correctly measuring barrel to frame gap on the Thompson Center break open guns. Using our custom tools, anyone can now measure and correc...

Basics to correctly measuring headspace on the Thompson Center break open guns. Using our custom tools, anyone can now measure and correct headspac...