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Long Range Hunting & Shooting
7mm RUM vs. 300 RUM and (PICS)....
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<blockquote data-quote="lead foot" data-source="post: 11784" data-attributes="member: 2546"><p>For deer-ish critter size you don't need the recoil that goes with pushing .30 caliber bullets to speeds where they'll expand at 600 yards.</p><p></p><p>I'd suggest looking at .25 to 7mm cartridges. They're going to kick a lot less and be easier to shoot precisely at longer range and still deliver plenty of punch to kill deer. To begin with, ignore the cartridge, pick candidate bullets, look at the ballistic tables, and see how fast you have to launch each so they arrive at 600 yards with enough velocity to expand, _then_ go back to the data sections and see what cartrides are needed to achieve those velocities.</p><p></p><p>It's sort of difficult to know how much velocity is needed to assure expansion. That may take some bullet testing. I semi-arbitrarily say the bullet has to retain 2200 fps at impact because I ran into problems some years ago with bullets failing to expand intermittently below that line. Not all bullets are equal in that sense, but you have to make some assumptions to get started and that's one I choose to make.</p><p></p><p>Each one of us has a different threshhold where the additional recoil that goes with greater mechanical range decreases our effective range. For me, in a 9.5# rifle, 7mm STW with 160 grain bullets is just about my limit, if it kicks more than that I have to adjust my hold on the gun in ways that reduce my range.</p><p></p><p>I would look really hard at the .264 Win Mag and 7mm STW for your buddy's use.</p></blockquote><p></p>
[QUOTE="lead foot, post: 11784, member: 2546"] For deer-ish critter size you don't need the recoil that goes with pushing .30 caliber bullets to speeds where they'll expand at 600 yards. I'd suggest looking at .25 to 7mm cartridges. They're going to kick a lot less and be easier to shoot precisely at longer range and still deliver plenty of punch to kill deer. To begin with, ignore the cartridge, pick candidate bullets, look at the ballistic tables, and see how fast you have to launch each so they arrive at 600 yards with enough velocity to expand, _then_ go back to the data sections and see what cartrides are needed to achieve those velocities. It's sort of difficult to know how much velocity is needed to assure expansion. That may take some bullet testing. I semi-arbitrarily say the bullet has to retain 2200 fps at impact because I ran into problems some years ago with bullets failing to expand intermittently below that line. Not all bullets are equal in that sense, but you have to make some assumptions to get started and that's one I choose to make. Each one of us has a different threshhold where the additional recoil that goes with greater mechanical range decreases our effective range. For me, in a 9.5# rifle, 7mm STW with 160 grain bullets is just about my limit, if it kicks more than that I have to adjust my hold on the gun in ways that reduce my range. I would look really hard at the .264 Win Mag and 7mm STW for your buddy's use. [/QUOTE]
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