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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.270 AM or 7mm AM
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<blockquote data-quote="Fiftydriver" data-source="post: 171074" data-attributes="member: 10"><p>Advantages for the 270 AM:</p><p> </p><p>EASY to form cases</p><p>Brass is inexpensive</p><p>Easy to fit into most conventional magnum length receivers(Rem 700)</p><p>Very high performance for medium size game</p><p> </p><p>Disadvantages:</p><p>Brass is not terribly strong with real high pressure loads</p><p>Some say brass quality is not that great, I have never had a problem</p><p>Very long, best with extended mag boxes, easy on the Rem 700</p><p>Best bullets are custom bullets but many conventional bullets work</p><p> </p><p>Advantages for 7mm AM:</p><p>Brass is extremely quality</p><p>Brass is extremely strong</p><p>Ability to use very heavy bullets for caliber, lots of bullet choices</p><p>Very high performance, about the most ballistic performance you will get</p><p>Relatively short compared to other true magnums</p><p> </p><p>Disadvantages:</p><p>Brass is spendy if that is a concern</p><p>More involved case forming for fireforming brass</p><p>Need a receiver capable of handling the 338 Lapua size cases</p><p> </p><p>Thats about it.</p><p> </p><p>Comparing the two best loads of each, the 270 AM with the 169.5 gr ULD loaded to 3350 fps and the 7mm AM with the 200 gr ULD loaded to 3300 fps, the 7mm definately has an edge ballistically but they are both on the top rung for ballistic performance for medium size game such as that up to heavy deer.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 171074, member: 10"] Advantages for the 270 AM: EASY to form cases Brass is inexpensive Easy to fit into most conventional magnum length receivers(Rem 700) Very high performance for medium size game Disadvantages: Brass is not terribly strong with real high pressure loads Some say brass quality is not that great, I have never had a problem Very long, best with extended mag boxes, easy on the Rem 700 Best bullets are custom bullets but many conventional bullets work Advantages for 7mm AM: Brass is extremely quality Brass is extremely strong Ability to use very heavy bullets for caliber, lots of bullet choices Very high performance, about the most ballistic performance you will get Relatively short compared to other true magnums Disadvantages: Brass is spendy if that is a concern More involved case forming for fireforming brass Need a receiver capable of handling the 338 Lapua size cases Thats about it. Comparing the two best loads of each, the 270 AM with the 169.5 gr ULD loaded to 3350 fps and the 7mm AM with the 200 gr ULD loaded to 3300 fps, the 7mm definately has an edge ballistically but they are both on the top rung for ballistic performance for medium size game such as that up to heavy deer. Kirby Allen(50) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.270 AM or 7mm AM
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