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Rifles, Reloading, Optics, Equipment
Reloading
My first 6mmAI is on the way .....
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<blockquote data-quote="Aussie" data-source="post: 142526" data-attributes="member: 2447"><p><strong>Re: MSU- here is what I worked up...</strong></p><p></p><p>[ QUOTE ]</p><p>it is not with the bullet weight that you menitoned, but run the ballistics on the computer...very impressive</p><p></p><p>26" shilen SM barrel</p><p></p><p>Win brass-FIRE FORMING LOADS</p><p>Fed 210 or 9 1/2</p><p>70g Ballistic tip</p><p>50.5g of Win 760</p><p>4050 fps with single digit SD and .385 groups</p><p></p><p>Formed loads</p><p>51.5g of 760</p><p>70g Nosler BT</p><p>4150 fps</p><p>bug hole groups</p><p></p><p>Work up to these loads in your rifle.</p><p></p><p>It is amazing how this much speed will cut down on wind drift and bullet drop to 550, after that the heavier bullet will take over on wind drift, but bullet drop is horendous.</p><p></p><p>For the heavier bullets, I wouild start off with R#19 and close to max pressures you will find an accuracy load. </p><p></p><p>[/ QUOTE ]</p><p></p><p>Keith ,</p><p>Those velocities are a good 300 FPS beyond maximum quoted in reloading manuals for the larger .240 Weatherby using 760 and 70gn projectiles although your powder charge is about 1gn lower .</p><p>6mmAI is usually good for about 100 FPS over .243 AI . My 26 inch .243AI topped out just under 3700 FPS with 760 and the 70gn Nosler .</p><p>Might be a good idea to check your chronograph because unless the 6mmAI defies the laws of physics then those numbers just don't seem to stack up .</p></blockquote><p></p>
[QUOTE="Aussie, post: 142526, member: 2447"] [b]Re: MSU- here is what I worked up...[/b] [ QUOTE ] it is not with the bullet weight that you menitoned, but run the ballistics on the computer...very impressive 26" shilen SM barrel Win brass-FIRE FORMING LOADS Fed 210 or 9 1/2 70g Ballistic tip 50.5g of Win 760 4050 fps with single digit SD and .385 groups Formed loads 51.5g of 760 70g Nosler BT 4150 fps bug hole groups Work up to these loads in your rifle. It is amazing how this much speed will cut down on wind drift and bullet drop to 550, after that the heavier bullet will take over on wind drift, but bullet drop is horendous. For the heavier bullets, I wouild start off with R#19 and close to max pressures you will find an accuracy load. [/ QUOTE ] Keith , Those velocities are a good 300 FPS beyond maximum quoted in reloading manuals for the larger .240 Weatherby using 760 and 70gn projectiles although your powder charge is about 1gn lower . 6mmAI is usually good for about 100 FPS over .243 AI . My 26 inch .243AI topped out just under 3700 FPS with 760 and the 70gn Nosler . Might be a good idea to check your chronograph because unless the 6mmAI defies the laws of physics then those numbers just don't seem to stack up . [/QUOTE]
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Reloading
My first 6mmAI is on the way .....
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