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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Heaviest 25 cal bullet we could make
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<blockquote data-quote="RockyMtnMT" data-source="post: 1268627" data-attributes="member: 7999"><p>We have one bullet for the 25cal that is designed for the 10" twist. The Hammer Hunter 92g. This one will shoot very well in your 10" twist.</p><p></p><p>As to why some guys can shoot some of the heavier bullets in the 10" twist and others can't may have something to do with the elevation. It could be the twist of the rifles can vary as well. Button rifled barrels can vary +/- on the actual twist up to 1/2". Couple that with bullets that are marketed for the 1/4 bore that are marginal for stability and it is easy to have them not shoot well. There other factors that come into play as well. Temp is a big one. A marginally stable bullet at 50* temp can become unstable with a significant drop in temp. Our 103g that is designed for 9" twist is a bit marginal at sea level with standard atmosphere (59*) and a 3000fps muzzle vel with an sg of 1.42. Take that same bullet and change the temp to 0* with everything else the same and the stability drops to 1.26sg. On the edge for shooting accurately. Run that same bullet with a muzzle vel of 3600fps and it is 1.51sg at standard atmosphere and 1.34sg at 0*. More marginal in this extreme condition than I would want to see, but should still work. This is another reason that one should try to shoot bullets that are better than 1.5sg for stability.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 1268627, member: 7999"] We have one bullet for the 25cal that is designed for the 10" twist. The Hammer Hunter 92g. This one will shoot very well in your 10" twist. As to why some guys can shoot some of the heavier bullets in the 10" twist and others can't may have something to do with the elevation. It could be the twist of the rifles can vary as well. Button rifled barrels can vary +/- on the actual twist up to 1/2". Couple that with bullets that are marketed for the 1/4 bore that are marginal for stability and it is easy to have them not shoot well. There other factors that come into play as well. Temp is a big one. A marginally stable bullet at 50* temp can become unstable with a significant drop in temp. Our 103g that is designed for 9" twist is a bit marginal at sea level with standard atmosphere (59*) and a 3000fps muzzle vel with an sg of 1.42. Take that same bullet and change the temp to 0* with everything else the same and the stability drops to 1.26sg. On the edge for shooting accurately. Run that same bullet with a muzzle vel of 3600fps and it is 1.51sg at standard atmosphere and 1.34sg at 0*. More marginal in this extreme condition than I would want to see, but should still work. This is another reason that one should try to shoot bullets that are better than 1.5sg for stability. Steve [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Heaviest 25 cal bullet we could make
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