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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6x55 A.I. questions
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<blockquote data-quote="Jud96" data-source="post: 1508279" data-attributes="member: 69478"><p>The 6x55 Improved would be a great cartridge, but realistically it will not have much gain over the 243 Ackley. The things I look for are the availability of good components and dies. There's also a couple great sources of brass for the .243 from Lapua and Peterson. You can also pick up .243 Ackley dies through MidSouth Shooter supply and other online stores and not have to special order them. </p><p></p><p>The 6mm Remington AI is a potent cartridge, but unless you already have a good amount of brass for it, I wouldn't bother with it. It will have a longer O.A.L. with the 105gr bullets and brass availability can be hit or miss. I wouldn't worry about the difference in neck length either. If you get a chamber properly throated for the 105s you'll have plenty of neck gripping the bullet's bearing surface in the .243 AI. </p><p></p><p>I shoot a standard 243 with 70-87gr bullets for Varmints and it's very easy to load for and a fast round. I've had friends build customs with fast twists shooting 105-107s at 3100-3200fps with the standard .243 Winchester. The Ackley will add another 100-150fps on top of that. I'm more concerned with accuracy, brass life, and quality component availability than a little bit of speed gain. </p><p></p><p>There's also a lot of other great 6mm cartridges out there that are smaller like the 6x47 Lapua, 6mm Creedmoor, and 6XC. They will have performance equal or slightly better to the standard .243 but be more efficient. There's also bigger cartridges like the 6mm-06, .240 WBY, and 6mm-284 that are real hot rods. I think the good old .243 Ackley falls in the middle though and would fit what you're looking for perfectly.</p></blockquote><p></p>
[QUOTE="Jud96, post: 1508279, member: 69478"] The 6x55 Improved would be a great cartridge, but realistically it will not have much gain over the 243 Ackley. The things I look for are the availability of good components and dies. There’s also a couple great sources of brass for the .243 from Lapua and Peterson. You can also pick up .243 Ackley dies through MidSouth Shooter supply and other online stores and not have to special order them. The 6mm Remington AI is a potent cartridge, but unless you already have a good amount of brass for it, I wouldn’t bother with it. It will have a longer O.A.L. with the 105gr bullets and brass availability can be hit or miss. I wouldn’t worry about the difference in neck length either. If you get a chamber properly throated for the 105s you’ll have plenty of neck gripping the bullet’s bearing surface in the .243 AI. I shoot a standard 243 with 70-87gr bullets for Varmints and it’s very easy to load for and a fast round. I’ve had friends build customs with fast twists shooting 105-107s at 3100-3200fps with the standard .243 Winchester. The Ackley will add another 100-150fps on top of that. I’m more concerned with accuracy, brass life, and quality component availability than a little bit of speed gain. There’s also a lot of other great 6mm cartridges out there that are smaller like the 6x47 Lapua, 6mm Creedmoor, and 6XC. They will have performance equal or slightly better to the standard .243 but be more efficient. There’s also bigger cartridges like the 6mm-06, .240 WBY, and 6mm-284 that are real hot rods. I think the good old .243 Ackley falls in the middle though and would fit what you’re looking for perfectly. [/QUOTE]
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