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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 Remington Ultra Magnum necked up to 50 caliber (.510)
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<blockquote data-quote="Bravo 4" data-source="post: 1278543" data-attributes="member: 8873"><p>375,</p><p>I know you have been chasing this for years now. So I tried to make you a dummy round today to no avail. I just couldn't get a .338 Edge case to hold up to such a large jump. The shoulders caved in, even after annealing them (even tried with necks fresh off the flame). This would require multiple steps up in caliber, that I don't have the dies for. </p><p>You will not reach your velocity goals with a short mag case. The RUM cases or bigger are needed. Even though mine is a shortened RUM case, it still has more room than the shorter cases. </p><p>As stated before, my rifle with a 16" barrel may reach your minimum target velocity with the 750 Amax. I pushed it to 1750 fps before I stopped, and didn't see pressure signs. Maybe if you played with a different powder and with a slightly longer barrel you could break the 1800 threshold. Or go with a bigger case so as not to have to push it.</p><p>It's a fun rifle (especially suppressed), CEB sent me some of their 350 grain Handgun Raptors last month to try and see what they will handle as far as velocity and tight twist (rpm's). Need to shoot a hog/deer/coyote to test terminal performance. These things have a giant hollow point with pre-scribed petals that come off. I bet it'll be nasty!</p><p>And yes it does headspace on the case mouth, works fine as long as you have your cases trimmed to the right length.</p></blockquote><p></p>
[QUOTE="Bravo 4, post: 1278543, member: 8873"] 375, I know you have been chasing this for years now. So I tried to make you a dummy round today to no avail. I just couldn't get a .338 Edge case to hold up to such a large jump. The shoulders caved in, even after annealing them (even tried with necks fresh off the flame). This would require multiple steps up in caliber, that I don't have the dies for. You will not reach your velocity goals with a short mag case. The RUM cases or bigger are needed. Even though mine is a shortened RUM case, it still has more room than the shorter cases. As stated before, my rifle with a 16" barrel may reach your minimum target velocity with the 750 Amax. I pushed it to 1750 fps before I stopped, and didn't see pressure signs. Maybe if you played with a different powder and with a slightly longer barrel you could break the 1800 threshold. Or go with a bigger case so as not to have to push it. It's a fun rifle (especially suppressed), CEB sent me some of their 350 grain Handgun Raptors last month to try and see what they will handle as far as velocity and tight twist (rpm's). Need to shoot a hog/deer/coyote to test terminal performance. These things have a giant hollow point with pre-scribed petals that come off. I bet it'll be nasty! And yes it does headspace on the case mouth, works fine as long as you have your cases trimmed to the right length. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 Remington Ultra Magnum necked up to 50 caliber (.510)
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