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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 Win rechambered to 243AI
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<blockquote data-quote="ballisticxlr" data-source="post: 1706073" data-attributes="member: 82022"><p>RE23, 45.5 grains for a 115 DTAC seated to -.040 under AICS mag length makes around 3180fps in a 26" tube for me. SD's for me are tiny, so are groups. I could have probably gotten another whole grain in the case but pressures were mellow and speeds were right up at the limit for the rules of the game I play so, why bother. I got 1500 rounds out of my .243AI before the throat growth caused me to start planning my next barrel and 1800 rounds before ammo got longer than the mag and no longer keeping anywhere near my desired jump. One of the best rifles I've ever shot. Loud as **** with a JP tactical brake. </p><p></p><p>Barrel life you're talking about is actually throat life and it's a fact as far as I can see that sharper shoulders help with it. Look at the intersection angle of the flame, guided by the intersection of lines formed by following the shoulder through the neck. If the intersection point is in the neck then it's not in the barrel doing bad things to your throat. </p><p></p><p>As far as brass life, in as many as 7 loadings on Hornady brass I never once had to so much as bump a shoulder or trim a case neck. I ran zero headspace and my chamber was set up with only .002" of total diametric clearance to out of the bag Hornady brass which helped minimize working of the brass. I could easily get 10 loads out of those cases. Hadn't even started splitting necks yet.</p></blockquote><p></p>
[QUOTE="ballisticxlr, post: 1706073, member: 82022"] RE23, 45.5 grains for a 115 DTAC seated to -.040 under AICS mag length makes around 3180fps in a 26" tube for me. SD's for me are tiny, so are groups. I could have probably gotten another whole grain in the case but pressures were mellow and speeds were right up at the limit for the rules of the game I play so, why bother. I got 1500 rounds out of my .243AI before the throat growth caused me to start planning my next barrel and 1800 rounds before ammo got longer than the mag and no longer keeping anywhere near my desired jump. One of the best rifles I've ever shot. Loud as **** with a JP tactical brake. Barrel life you're talking about is actually throat life and it's a fact as far as I can see that sharper shoulders help with it. Look at the intersection angle of the flame, guided by the intersection of lines formed by following the shoulder through the neck. If the intersection point is in the neck then it's not in the barrel doing bad things to your throat. As far as brass life, in as many as 7 loadings on Hornady brass I never once had to so much as bump a shoulder or trim a case neck. I ran zero headspace and my chamber was set up with only .002" of total diametric clearance to out of the bag Hornady brass which helped minimize working of the brass. I could easily get 10 loads out of those cases. Hadn't even started splitting necks yet. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 Win rechambered to 243AI
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