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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 twist rate, what are your thoughts?
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<blockquote data-quote="J E Custom" data-source="post: 185315" data-attributes="member: 2736"><p>Ranger</p><p></p><p>You did not miss anything .</p><p></p><p>What I call hard loads are normaly over max saame pressure.</p><p></p><p>These can be from hard bolt lift to blown primers,Even though</p><p>not recomended there are a lot of people that do load (HARD).</p><p></p><p>I once owned a 1000 k rifle that loved velocity (The faster I</p><p>pushed the bullet the better it shot) so I loaded so hard that I </p><p>could only get two loadings out of the brass .</p><p></p><p>As far as Twist the velocity of a bullet normaly sets the rate of </p><p>twist.(the faster the bullet the slower the twist) .</p><p>The fact that the 300gr in .338 is slower than a 225gr or a 250gr</p><p>in the same chambering was the reason for the recomendations.</p><p></p><p>The 1 in 9.5 twist would be my choice if I knew that I intended</p><p>to use the 300gr bullet and lighter with out over rotating the</p><p>bullet.</p><p></p><p>On my 338 rum I load a 225gr accubond to just over 3300ft/sec</p><p>so I chose the 1 in 10 twist in case I wanted to shoot 200gr or</p><p>210gr to 34 or 3500ft/sec.</p><p></p><p>I think you chose the right twist (1 in 9.4) for your velocity with </p><p>the 300gr SMK , But if you tryed to shoot say a 160gr at 36 to </p><p>3700ft/sec (very possible in your LAI) you might have a problem </p><p>with over roation.</p><p></p><p>So I try to pick a rate of twist that is the MOST likely to to work</p><p>within the range of bullets to be used.This is not to say that a</p><p>slower or faster rate of twist can not be made to work.</p><p></p><p>I always talk to my customers about what the intended use of</p><p>the rifle is (hunting or target) and the range of bullet weights</p><p>to be used so I can make recomendations as to barrel Type,</p><p>weight,length and twist for optimum performance .</p><p></p><p>Sorry if my term LOAD HARD threw you off . Just one of</p><p>many terms learned at the jeff foxworthy school of english.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 185315, member: 2736"] Ranger You did not miss anything . What I call hard loads are normaly over max saame pressure. These can be from hard bolt lift to blown primers,Even though not recomended there are a lot of people that do load (HARD). I once owned a 1000 k rifle that loved velocity (The faster I pushed the bullet the better it shot) so I loaded so hard that I could only get two loadings out of the brass . As far as Twist the velocity of a bullet normaly sets the rate of twist.(the faster the bullet the slower the twist) . The fact that the 300gr in .338 is slower than a 225gr or a 250gr in the same chambering was the reason for the recomendations. The 1 in 9.5 twist would be my choice if I knew that I intended to use the 300gr bullet and lighter with out over rotating the bullet. On my 338 rum I load a 225gr accubond to just over 3300ft/sec so I chose the 1 in 10 twist in case I wanted to shoot 200gr or 210gr to 34 or 3500ft/sec. I think you chose the right twist (1 in 9.4) for your velocity with the 300gr SMK , But if you tryed to shoot say a 160gr at 36 to 3700ft/sec (very possible in your LAI) you might have a problem with over roation. So I try to pick a rate of twist that is the MOST likely to to work within the range of bullets to be used.This is not to say that a slower or faster rate of twist can not be made to work. I always talk to my customers about what the intended use of the rifle is (hunting or target) and the range of bullet weights to be used so I can make recomendations as to barrel Type, weight,length and twist for optimum performance . Sorry if my term LOAD HARD threw you off . Just one of many terms learned at the jeff foxworthy school of english. J E CUSTOM [/QUOTE]
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338 twist rate, what are your thoughts?
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