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Rifles, Reloading, Optics, Equipment
Specialty Handgun Hunting
Twist rate for a 30 cal xp-100
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<blockquote data-quote="Buttermilk" data-source="post: 1578659" data-attributes="member: 5262"><p>I'm soon planning to embark on my next XP-100 build. Currently planning to do a 30 cal cartridge that hopefully will push a 210-212-215 class bullet to at least 2750, maybe even 2800+ FPS (be nice to achieve 2850fps, just not sure I can get there with a barrel length of ~18"). I have not yet decided which case/cartridge. I will likely do a 30 Nosler, 30-28 Nosler or a similar cartridge. Maybe even a true wildcat, if I decide I need more case capacity.</p><p></p><p>One thing I'm kinda hung up on is twist rate. I originally planned to do a 1:10" twist, but now am considering doing a 1:9" twist.</p><p></p><p>The Berger twist calculator shows that a 10" twist would be adequate, but I'm still considering doing a 1:9" twist. Partly due to the lower expected velocity that my XP-100 will generate compared to a rifle length barrel with same/similar cartridge.</p><p></p><p>I don't really have any plans to shoot the heavier 230+ bullets since I'm primarily going to use this gun for hunting. Maybe the occasional long range target, but still likely with 210-212-215 class bullets.</p><p></p><p>Anyone here ever did something similar?</p></blockquote><p></p>
[QUOTE="Buttermilk, post: 1578659, member: 5262"] I'm soon planning to embark on my next XP-100 build. Currently planning to do a 30 cal cartridge that hopefully will push a 210-212-215 class bullet to at least 2750, maybe even 2800+ FPS (be nice to achieve 2850fps, just not sure I can get there with a barrel length of ~18"). I have not yet decided which case/cartridge. I will likely do a 30 Nosler, 30-28 Nosler or a similar cartridge. Maybe even a true wildcat, if I decide I need more case capacity. One thing I'm kinda hung up on is twist rate. I originally planned to do a 1:10" twist, but now am considering doing a 1:9" twist. The Berger twist calculator shows that a 10" twist would be adequate, but I'm still considering doing a 1:9" twist. Partly due to the lower expected velocity that my XP-100 will generate compared to a rifle length barrel with same/similar cartridge. I don't really have any plans to shoot the heavier 230+ bullets since I'm primarily going to use this gun for hunting. Maybe the occasional long range target, but still likely with 210-212-215 class bullets. Anyone here ever did something similar? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Specialty Handgun Hunting
Twist rate for a 30 cal xp-100
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