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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6mm ackley and 6/284 barrel life
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<blockquote data-quote="Trickymissfit" data-source="post: 865207" data-attributes="member: 25383"><p>Ackley said the 6mm Remington was about max capacity for the 24 caliber bore. The 6/284 and the 6mm Ackley are both overbore, and will decrease the barrel life. The .284 case will be much worse than the Ackley, and have close to the same velocity. The Ackley ought to show close to 33% greater shot life.</p><p> </p><p>But on the otherhand, I know some guys that shoot that case, but not like we think of. The started out with a standard 6/284 case and ate barrels so fast that they were a barrel maker's dream come true! One guy got the grand idea of running the reamer in .100" short. He lost about 70 fps, and nearly doubled his barrel life with tighter groups (same reamer everytime). His buddy was so impressed that he did the same chamber .150" short, and lost about 100fps. Later a couple more guys did the .100" short chambers with similar results. The first guy bought his own reamer (identical), but with a .05" longer neck, and did even better. He sent me a couple photos of chucks he shot in the 750 to 850 yard range using Berger bullets. Two of these guys eventually went back to the 6mm Ackley due to cases being next to impossible to find. </p><p> </p><p>Now I've shot the 6mm, 6mmAI, as well as the .257AI. All shoot very well, and wouldn't hesitate to own any of them. They use about 10% less powder for similar velocities (Ackley verses the .284 case). I like the 35 degree shoulder better than the 40 degree shoulder, and for me the neck length is adequate but would rather saw it at .32". I can't see much difference in recoil between the 6/284 and the 6mmAI. Even the short versions are similar. </p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 865207, member: 25383"] Ackley said the 6mm Remington was about max capacity for the 24 caliber bore. The 6/284 and the 6mm Ackley are both overbore, and will decrease the barrel life. The .284 case will be much worse than the Ackley, and have close to the same velocity. The Ackley ought to show close to 33% greater shot life. But on the otherhand, I know some guys that shoot that case, but not like we think of. The started out with a standard 6/284 case and ate barrels so fast that they were a barrel maker's dream come true! One guy got the grand idea of running the reamer in .100" short. He lost about 70 fps, and nearly doubled his barrel life with tighter groups (same reamer everytime). His buddy was so impressed that he did the same chamber .150" short, and lost about 100fps. Later a couple more guys did the .100" short chambers with similar results. The first guy bought his own reamer (identical), but with a .05" longer neck, and did even better. He sent me a couple photos of chucks he shot in the 750 to 850 yard range using Berger bullets. Two of these guys eventually went back to the 6mm Ackley due to cases being next to impossible to find. Now I've shot the 6mm, 6mmAI, as well as the .257AI. All shoot very well, and wouldn't hesitate to own any of them. They use about 10% less powder for similar velocities (Ackley verses the .284 case). I like the 35 degree shoulder better than the 40 degree shoulder, and for me the neck length is adequate but would rather saw it at .32". I can't see much difference in recoil between the 6/284 and the 6mmAI. Even the short versions are similar. gary [/QUOTE]
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6mm ackley and 6/284 barrel life
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