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Although I've been loading a couple of dozen calibers for 30 something years, taking on the 9.3x74R has me a bit flustered. I'm losing about 30%-40% out of every batch of brass to crumpling cases while bullet seating. The only thing that seems to help, and not by a whole lot, is to really severely chamfer the inside of the case neck just before charging and bullet seating. I'm (trying to) load 286 Nosler partitions. The identical problem occurs with both Norma and RWS brass. Anybody out there have the key to the secret lock? Is there a good 286 gr boattail I haven't found? ______________________ RMEF Life Member SCI DRSS Chapuis 9,3/9,3 + 20/20 Simson 12/12/9,3 Zoli 7x57R/12 Kreighoff .470/.470 We band of 9,3ers! The Few. The Pissed. The Taxpayers. | ||
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That's bizarre. I've never loaded the 286 Nosler, but I've loaded quite a variety of 9.3 bullets in RWS cases. I never use an expander ball and have never collapsed a single case neck when seating a bullet. That just doesn't happen unless the bullet is oversize or the dies are defective. Have you miked the bullet to be sure its .366"? This sounds like a die problem to me. What brand are you using. Are they CH? ------------------------------------------------ "Serious rifles have two barrels, everything else just burns gunpowder." | |||
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Get a tapered .375 expander plug, and put this on a handle. Use this to VERY slightly bell your case mouths... just press it down, "wallow" your hand around, and put an ever so slight bell around the neck. The neck on the seater will close this back up with you crimp jeffe opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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I have found that the cases must be trimmed to an even length, and slightly belled before loading. Helps to use a little lube on the inside of the case mouths, All of that reduces entry pressure and assures that there is a consistend crimp without over stressing the longer cases. No problems when I do those things. Mike -------------- DRSS, Womper's Club, NRA Life Member/Charter Member NRA Golden Eagles ... Knifemaker, http://www.mstarling.com | |||
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or as a last resort you can always seat the bullet upside down and call it a wadcutter - sorry - its just one of them days  | |||
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Actually I used to have a .38 Colt that just LOVED upside-down hollow base wadcutters. Now THAT'S a hollow point. Thanks for the expander bell idea. ______________________ RMEF Life Member SCI DRSS Chapuis 9,3/9,3 + 20/20 Simson 12/12/9,3 Zoli 7x57R/12 Kreighoff .470/.470 We band of 9,3ers! The Few. The Pissed. The Taxpayers. | |||
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400- They're brand new RCBS dies. ______________________ RMEF Life Member SCI DRSS Chapuis 9,3/9,3 + 20/20 Simson 12/12/9,3 Zoli 7x57R/12 Kreighoff .470/.470 We band of 9,3ers! The Few. The Pissed. The Taxpayers. | |||
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You could run your seater die up and your seater stem down and do a two part seat and crimp. First get your cartridge to the overall length you want, back the seater stem out and then start working the die down to crimp mode a little at a time. Takes time but works in these type of cases. The only easy day is yesterday! | |||
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I'm thinking something similar, in that you're seating and crimping at the same time, with the result being that the crimping has started while the seater is still pushing the bullet down, .......so the bullet, now locked in place, still has down pressure from the seater, and the result is brass starting to fold beneath the bullet. Try backing your die out and lowering the seater, resulting in a seated bullet, .......any brass folding? If not, then try crimping as a separate function, ....this may get rid of the folding. I've seen this happen before, even on .375H&H. ~Arctic~ A stranger is a friend we haven't met | |||
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Check die adjustment. I've loaded about 400 rounds (mostly RWS a few Norma) with 286 Partitions. Have also loaded a number of North Fork solids, Hawks and TSX. No problems using RCBS dies. DRSS NRA Life Member VDD-GNA | |||
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Do you seat and crimp in 2 separate operations? If not, start now. Do you bell the case mouths? That might be a good idea. | |||
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[/OUOTE] Do you seat and crimp in 2 separate operations? If not, start now. I always buy an extra seating die so that the seat and crimp are two operations. I have loaded 9.3 Norma brass with the swift 300grain bullets, with RCBS dies-no problem. "An individual with experience is never at the mercies of an individual with an argument" | |||
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Your problem may be your full length seating die reducng the neck diameter to a too small diameter. Do you full lrngth size new brass? If so try loading a couple of rounds with out full length sizing. If you don't have a problem, send the die back to RCBS. 465H&H | |||
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Again, if the dies are the correct dimensions, there is no need to bell the case mouth prior to seating. In forty years of loading centerfire rifle, I've never done so, nor have I ever encountered the need to. For sure, there is no need to crimp with this cartridge. The dies are defective. Send them back. ------------------------------------------------ "Serious rifles have two barrels, everything else just burns gunpowder." | |||
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