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December 15, 2008
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I have been reloading for 15 years and have been to a lot of sites for data both manufacturer's and private. However I can't ever remember seeing a recommendation on any site for crimping. Liability Issue perhaps? I always put a light crimp on all my .380, 9mm, .38 special and .357. It seems to me that crimping is the only way to assure close to the same pressures for accuracy if you are a paper puncher like me. Yeah or Nay?
Saddle Sore in Plano, Texas
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February 22, 2009
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I taper crimp all cartridges that headspace on the case mouth (straight wall, rimless) and roll crimp on all other handgun ammunition.
Crimping is indeed another variable but what contributes to the consistency of ammunition is neck tension.
Regards, Ron
Technically, the glass is always full; half liquid, half air....
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December 4, 2011
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+1 to rwsem.
I'll add that I put a bit of extra crimp on all my Supermags to prevent inertial bullet creap from the strong recoil.
I shot some 375 SM reloads I got at a gunshow and they all jumped crimp after only one or two rounds. In fact a few moved so far as to interfere with cylinder rotation. I also prefer cannelure bullets for those cartridges as it gives the crimp something to grab onto. Your mileage may vary.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
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June 8, 2009
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I crimp my handgun reloads. I do this as a separate step. I like the Lee Factory Crimp Die for this. For those rounds that I don't have the Lee for I try to buy an extra seating/crimp die.
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December 4, 2011
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I should have mentioned that I use a Dillon progressive press and they use a dedicated crimp die in all their die sets. I like that feature of their dies. You can control the crimp better with a standalone die.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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January 24, 2009
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SCORPIO said
+1 to rwsem.I'll add that I put a bit of extra crimp on all my Supermags to prevent inertial bullet creap from the strong recoil.
I shot some 375 SM reloads I got at a gunshow and they all jumped crimp after only one or two rounds. In fact a few moved so far as to interfere with cylinder rotation. I also prefer cannelure bullets for those cartridges as it gives the crimp something to grab onto. Your mileage may vary.
Agreed! Especially with .375SM...those really love to jump crimp, especially in my Seville.
I have found that .357's are particularly sensitive to a mildly heavy crimp...it will bulge the cases ever so slightly & make it a PITA to chamber in tight cylinder bores. Easy does it...
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