300 H&H AI brass can be formed from?
Now I went and did it. I ran across a really clean Remington 721 chambered in 300 H&H Ackley Improved. It was built by Ackleys shop back in the late 50's. I got it from the original owner, but one of his family snagged all the brass and ammo he had for it.
Everyone but Nosler seems to be out of this size. If needed I will get it from them. But seeing how I am going to have to fire-form it, is there anything close that I should try to get? 375 H&H and neck it down and then fire-form it?