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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel length & twist questions
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<blockquote data-quote="Buster Hemlock" data-source="post: 2093650" data-attributes="member: 109327"><p>just because your current barrel shoots the 195's well doesn't mean your new one will. So don't put all your eggs in that basket. As far as 27" or 28" nothing significant between the two, couple FPS and a fast 24-26" barrel may outperform your new barrel for velocity if it turns out to be slow, luck of the draw. For twist I'd say 1:8" will do what you want with 195's and less with cup and core bullets, heavy monos you will need faster but even at sea level and 2650 FPS your bullet is stable until you get close to 38* F, increase your altitude some and velocity and your going to be plenty stable at lower temps. Check out Bergers stability calculator and decide for yourself what you need.</p></blockquote><p></p>
[QUOTE="Buster Hemlock, post: 2093650, member: 109327"] just because your current barrel shoots the 195's well doesn't mean your new one will. So don't put all your eggs in that basket. As far as 27" or 28" nothing significant between the two, couple FPS and a fast 24-26" barrel may outperform your new barrel for velocity if it turns out to be slow, luck of the draw. For twist I'd say 1:8" will do what you want with 195's and less with cup and core bullets, heavy monos you will need faster but even at sea level and 2650 FPS your bullet is stable until you get close to 38* F, increase your altitude some and velocity and your going to be plenty stable at lower temps. Check out Bergers stability calculator and decide for yourself what you need. [/QUOTE]
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Barrel length & twist questions
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