GAP did not build this rifle, but might help. Built with the 'new' tight neck reamer from PT&G
Measured land engagement with 140JLKs @ 2.910" in my chamber
To be safe, I loaded them to 2.900" and dumped in the H-1000. Shot it Saturday to zero in, 1/2 moa group result from zero load development!
ran dope to 440yds on steel using 3080fps, hit dead center...
Took it hunting yesterday morning and poleaxed a mature doe through the shoulders @ 330yds. Bang/flop and here's the exit from a 140JLK...
These rounds are feeding from a Wyatt's extended magazine box with the factory WSM follower & crapola bottom metal. Put a Bushy 6500 on for now, to represent
Grab a glass and fill up on the Koolaid...