Fiftydriver
Official LRH Sponsor
Just got this one tested and ready to ship.
Customer wanted to build a long range, mid weight Comp style rifle. This is one of my XHS rifles chambered in my 338 Allen Magnum. Customer wanted the 300 gr Berger OTM clipping along at 3350 fps. This is relatively easy to do with any barrel 32" or over with my 338 AM but to keep brass life as long as possible, we went with a 34" Bartlein 9.3 twist barrel built to my Standard XHS contour.
using RL50, load development showed 142.0 gr. With a 4.280" oal and lit with a Fed-215 primer would average 3348 fps with very comfortable pressures offering a minimum of 8 firings per case and very likely 10+ with a couple neck/shoulder annealings along the way.
during load development i always develope loads for my rifles to the top end of their working pressures, that being increase powder charge until I see the first minute signs of primer pocket loosening, then in the case if this size of cartridge, reduce that load by one grain and consider that the absolute max working load.
in this rifle, that point was 145.0 gr which produced 3462 fps with the 300 gr berger. At that level, brass life would be in the 4-5 firings per case but still totally safe. Again, with brass as rare and spendy as it is these days, i usually drop off this max level significantly to increase brass life.
tested yesterday morning at 1025 yards in a 15-25 mph wind and this rifle simply ate up the wind which is what its designed to do. Easily met my accuracy standards even in the poor conditions. Ready to ship to its new home and a happy new owner!!
Customer wanted to build a long range, mid weight Comp style rifle. This is one of my XHS rifles chambered in my 338 Allen Magnum. Customer wanted the 300 gr Berger OTM clipping along at 3350 fps. This is relatively easy to do with any barrel 32" or over with my 338 AM but to keep brass life as long as possible, we went with a 34" Bartlein 9.3 twist barrel built to my Standard XHS contour.
using RL50, load development showed 142.0 gr. With a 4.280" oal and lit with a Fed-215 primer would average 3348 fps with very comfortable pressures offering a minimum of 8 firings per case and very likely 10+ with a couple neck/shoulder annealings along the way.
during load development i always develope loads for my rifles to the top end of their working pressures, that being increase powder charge until I see the first minute signs of primer pocket loosening, then in the case if this size of cartridge, reduce that load by one grain and consider that the absolute max working load.
in this rifle, that point was 145.0 gr which produced 3462 fps with the 300 gr berger. At that level, brass life would be in the 4-5 firings per case but still totally safe. Again, with brass as rare and spendy as it is these days, i usually drop off this max level significantly to increase brass life.
tested yesterday morning at 1025 yards in a 15-25 mph wind and this rifle simply ate up the wind which is what its designed to do. Easily met my accuracy standards even in the poor conditions. Ready to ship to its new home and a happy new owner!!
