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Long Range Hunting & Shooting
Best LR .30 caliber on .473 bolt face
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<blockquote data-quote="TRexF16" data-source="post: 2029398" data-attributes="member: 108912"><p>Regarding using the Wby RPM case as the basis for a wildcat 30, I don't think you'd have a problem going form .264 to .308, particularly using the Cream of Wheat filler fireforming method. As a reference, a friend and I designed an built a couple wildcats about 25 years ago that could be considered about like a 338 Gibbs, that we called the .338 Express. We used .280 Rem cases as the basis for it and don't recall ever losing any. It was a huge PITA but I had the wildcat bug and it was fun for a while. We had to neck up to .358, then back down to form a false shoulder, then Cream of Wheat fire form to get the final case. In contrast, forming a "7.62 WBY RPM" would be a one step fireform with a small charge of Bullseye and a case full of COW.</p><p></p><p>Who knows how well it would feed in the OP's rifle, but I just wanted to address the case creation.</p><p></p><p>I'm with Feenix that either the basic -06 or one of the wildcats on it that plays with the shoulder is the best bet. Jud96's numbers above with the -06AI and the 205 Berger look real nice and perfectly reasonable. I can't imagine any safe way to achieve the OP's desire of besting the 300WM with a .473 rim except some pretty significantly rebated-case option.</p><p></p><p>Funny, I just saw the press release about those new rounds adopted by SAAMI three days ago and wrote to my buddy, "Better stand back before the wildcatters trample you running for that 6.5 Wby RPM!"</p><p></p><p>Cheers,</p><p>Rex</p></blockquote><p></p>
[QUOTE="TRexF16, post: 2029398, member: 108912"] Regarding using the Wby RPM case as the basis for a wildcat 30, I don't think you'd have a problem going form .264 to .308, particularly using the Cream of Wheat filler fireforming method. As a reference, a friend and I designed an built a couple wildcats about 25 years ago that could be considered about like a 338 Gibbs, that we called the .338 Express. We used .280 Rem cases as the basis for it and don't recall ever losing any. It was a huge PITA but I had the wildcat bug and it was fun for a while. We had to neck up to .358, then back down to form a false shoulder, then Cream of Wheat fire form to get the final case. In contrast, forming a "7.62 WBY RPM" would be a one step fireform with a small charge of Bullseye and a case full of COW. Who knows how well it would feed in the OP's rifle, but I just wanted to address the case creation. I'm with Feenix that either the basic -06 or one of the wildcats on it that plays with the shoulder is the best bet. Jud96's numbers above with the -06AI and the 205 Berger look real nice and perfectly reasonable. I can't imagine any safe way to achieve the OP's desire of besting the 300WM with a .473 rim except some pretty significantly rebated-case option. Funny, I just saw the press release about those new rounds adopted by SAAMI three days ago and wrote to my buddy, "Better stand back before the wildcatters trample you running for that 6.5 Wby RPM!" Cheers, Rex [/QUOTE]
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Best LR .30 caliber on .473 bolt face
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