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The .480Ruger is spec'd at a max pressure of 48kpsi. It's also based on the 45-70 case so it should produce similar thrust to a hot 45-70. As long as it's loaded to spec and not hot-rodded past it's intent, it seems like a good choice. And it's a real pistol round, unlike 45-70. 45-70 requires a pistol nearly as heavy as a rifle! And 480 is a capable big game round to boot.

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I am the customer and we decided on 500 Linebaugh. The projectile diameter is the same as 500 NE, and it is a low pressure round. Linebaugh reports 30,000 psi. With case thrust like the 45-70. I will be shooting a 950 fps with a hard cast flat 435 grain bullet pistol load (for 7.5 inch barrel) that I am hoping/expecting to get me in the 1000-1100 fps from a 24 inch barrel. This load should still have about 800 fps at 100 yards according to online ballistics calculator. I would find it hard to believe that this load wouldn't put down any North American game animal with a well placed shot. The recoil should be extremely manageable in a rifle.

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