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Stealthshooter wrote:I was wondering if one of you guys would be willing to give a step by step on how to turn .284 brass into 450 brass?
BD1 wrote:The inside neck reaming issue may be particular to some chambers. I use only .284 brass with jacketed .452 bullets and I've never needed to ream a piece. The only trouble I've had with these cases is using 400 grain and heavier boolits, or cast boolits sized .453. The original thread about cutting down .284 brass is linked below:
viewtopic.php?f=5&t=38
wildcatter wrote:...snip...
But the only real thing at that point you need to do, is just cut and trim to 1.700". Don't make them very much shorter, as they seem to shrink over many successive reloads...snip...
..t
BD1 wrote:I think this must be a sign of tolerance issues with the bushy extractor and bolt assembly, again because I don't experience this issue with my rifle. I don't "fireform" the .284 brass at all. I just cut it down, trim it, chamfer it, load it and go to the range. I've gotten a little slack on my record keeping after the first 500 rounds, but I must be somewhere near 1,000 rounds through this upper at this point, the majority of it using .284 brass, and I'm not having any issues loading the 225 or 250 grain FTXs in the Hornady brass, seated out to 2.250 or so. My upper is one of the earlier ones, I ordered it in 2008 from Cabelas. It's possible that the extractor dimensions are a little different on the more recent uppers.
It's my impression that the .284 brass doesn't shrink as much on resizing as the Hornady brass. I don't have any empirical evidence to support this, it's only that I've retired a bunch of Hornady brass for being less than 1.60, and so far none of the .284 brass has gotten that short. Not very scientific I know, but I treat .450B brass about like like .45 acp brass, I just keep shooting them until I loose them or they're too short to land the crimp effectively. Once I have a bunch of dirty brass I wash them and throw them all in the tumbler together. I've never had a split .450 case, and the primer pockets don't seem to get loose, so I see no reason to sort them by batch, or keep track of how many times they've been fired. This is a straight wall case that is run at pressure levels well below the yield strength of the brass, (unless maybe you're WC )
BD
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