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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Factory vs custom barrel velocity ?
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<blockquote data-quote="BountyHunter" data-source="post: 149137" data-attributes="member: 12"><p>James</p><p></p><p>Not aiming comments at any one person. </p><p></p><p>To all </p><p></p><p>Second stability will be a factory of MV. As MV slows loss of stability will be a factor. 240s can easily go in excess of one mile accurately in the right gun and case combo.</p><p></p><p>Most of the BR bullets are Flat base with a pressure ring that is larger than the bullet diameter. The game is pure accuracy, most have no clue what their MV really is.</p><p></p><p>I shoot the BIB FB bullets that have pressure ring, I give up some in BC compared to the VLDs. However, in the pure accuracy game, BC is minor compared to higher quality FB bullets. I do not have to sort by ogive, I do not even Juenke my normal match bullets. I will for the Nationals though. Plus I can go one twist slower, right now I am shooting a 1-12 with 300 WSM and 187s (3025 fps) and a 1-9 with 105/108 Bibs in a 6mm BRDX (AI) (3130 fps).</p><p></p><p>Bullets will vary in diameter by mftr. Krieger has a .236 and a .237 bore diameter for its 6mm barrels. Different bullets for different barrels. However, they are the main mftr that does this and only in 6mm to my knowledge. That is mainly due to the short range BR game.</p><p></p><p>Palma guys use the tighter bore because the rules say 155s and 308s to 1000 and they need the MV to get there. That combo works for them.</p><p></p><p>bottom line it normally is a combo of twist, bullet weight/design and MV.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 149137, member: 12"] James Not aiming comments at any one person. To all Second stability will be a factory of MV. As MV slows loss of stability will be a factor. 240s can easily go in excess of one mile accurately in the right gun and case combo. Most of the BR bullets are Flat base with a pressure ring that is larger than the bullet diameter. The game is pure accuracy, most have no clue what their MV really is. I shoot the BIB FB bullets that have pressure ring, I give up some in BC compared to the VLDs. However, in the pure accuracy game, BC is minor compared to higher quality FB bullets. I do not have to sort by ogive, I do not even Juenke my normal match bullets. I will for the Nationals though. Plus I can go one twist slower, right now I am shooting a 1-12 with 300 WSM and 187s (3025 fps) and a 1-9 with 105/108 Bibs in a 6mm BRDX (AI) (3130 fps). Bullets will vary in diameter by mftr. Krieger has a .236 and a .237 bore diameter for its 6mm barrels. Different bullets for different barrels. However, they are the main mftr that does this and only in 6mm to my knowledge. That is mainly due to the short range BR game. Palma guys use the tighter bore because the rules say 155s and 308s to 1000 and they need the MV to get there. That combo works for them. bottom line it normally is a combo of twist, bullet weight/design and MV. BH [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Factory vs custom barrel velocity ?
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