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Long Range Hunting & Shooting
Flat shooting Elk gun?
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<blockquote data-quote="Brent" data-source="post: 68189" data-attributes="member: 99"><p>I would feel much more comfortable using a .338 300gr SMK on an Elk than a 200gr 7mm, at any range... but maybe that's just me. That is not saying I would NOT use a 7mm, just what my preference would be... The higher SD goes to the .338 300gr as well, more of an "apples to apples" comparison. </p><p></p><p>Kirby,</p><p>What length barrel are you looking to achieve 3200 in with the 200gr bullet? </p><p></p><p>What do you think you'd get for speed in a 30" bbl with that bullet by necking down and improving the 30/378 Wby case? I think it's going to take about that much case capacity myself, because I do know the 338 Lapua case with it's internal capacity does have it's limitations, as does the Ultra Mag case. Because of this I'll be doing some testing this fall on a several LR cartridges based off the .416 Rigby case, and the .408 CT case. Testing will include 7mm, .308 and .338 as the initial reamers are both in 7mm. I am designing and will be manufacturing a center feed 5rd. drop box magazine (internal length of 4.0") along with matching bottom metal for the Rem. 700, which will only require little machining to fit the existing BDL.</p><p></p><p>Efficiency is nice but, more powder will simply have to be burnt to achieve your MV goal at some point, and a longer/larger case will ultimately provide the highest MV, or equal any other but do so with less chamber pressure. </p><p></p><p>The 338/416 Rigby Imp. pushing a 300gr SMK at 3200-3300 fps in a 36" bbl is probably the pinicle of performance and will take alot to be beat ballistically, save the .50 BMG. The 338/408 CT will be a fun project but it simply will not work in the Rem. 700 action so, the 500 Jeffery case that will may get closer attention even though brass price is much higher than the other two, it does have potential to be king of the hill over the 338/416 Rigby Imp though.</p><p></p><p>And, I fall into the "really must use a cannon" crowd and I doubt I'd pass on a shot based on distance alone, although I do have my limits, just a bit more than 300 yards. /ubbthreads/images/graemlins/smile.gif</p></blockquote><p></p>
[QUOTE="Brent, post: 68189, member: 99"] I would feel much more comfortable using a .338 300gr SMK on an Elk than a 200gr 7mm, at any range... but maybe that's just me. That is not saying I would NOT use a 7mm, just what my preference would be... The higher SD goes to the .338 300gr as well, more of an "apples to apples" comparison. Kirby, What length barrel are you looking to achieve 3200 in with the 200gr bullet? What do you think you'd get for speed in a 30" bbl with that bullet by necking down and improving the 30/378 Wby case? I think it's going to take about that much case capacity myself, because I do know the 338 Lapua case with it's internal capacity does have it's limitations, as does the Ultra Mag case. Because of this I'll be doing some testing this fall on a several LR cartridges based off the .416 Rigby case, and the .408 CT case. Testing will include 7mm, .308 and .338 as the initial reamers are both in 7mm. I am designing and will be manufacturing a center feed 5rd. drop box magazine (internal length of 4.0") along with matching bottom metal for the Rem. 700, which will only require little machining to fit the existing BDL. Efficiency is nice but, more powder will simply have to be burnt to achieve your MV goal at some point, and a longer/larger case will ultimately provide the highest MV, or equal any other but do so with less chamber pressure. The 338/416 Rigby Imp. pushing a 300gr SMK at 3200-3300 fps in a 36" bbl is probably the pinicle of performance and will take alot to be beat ballistically, save the .50 BMG. The 338/408 CT will be a fun project but it simply will not work in the Rem. 700 action so, the 500 Jeffery case that will may get closer attention even though brass price is much higher than the other two, it does have potential to be king of the hill over the 338/416 Rigby Imp though. And, I fall into the "really must use a cannon" crowd and I doubt I'd pass on a shot based on distance alone, although I do have my limits, just a bit more than 300 yards. [img]/ubbthreads/images/graemlins/smile.gif[/img] [/QUOTE]
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