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Old April 19, 2014, 10:17 PM   #1
skizzums
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taper crimp die

hey guys, been loading 9mm for a good bit, i have never used a taper crimp because i didnt buy the deluxe set wit my lee press. i would like to play around with one, after simply searching 9mm taper crimp die, i get a hornaday, lee, lyman all between 20 and 24 bucks. any difference between the crimp that these leave? any better than other, or do tey all do the same thing wth maybe just a difference in the quality of the die itself
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Old April 20, 2014, 09:06 AM   #2
Don P
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9 mm dies will be a taper crimp. That is what all die makers will have. You can buy taper crimp dies for revolver cartridges. Semi-autos are a taper crimp and revolvers are a roll crimp as a general rule.
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Old April 20, 2014, 09:40 AM   #3
pete2
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A taper crimp is a taper crimp however, taper crimping while seating the bullet may cause problems, I did it for a while but I got deformed noses on by bullets. I found it best to crimp after seating the bullet on both 45 and 9MM.
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Old April 20, 2014, 10:49 AM   #4
JT-AR-MG42
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Pete is correct. Best to always seat and taper crimp as two steps.
I also do my roll crimping separate as well.

I use Lyman dies and their taper crimp dies exclusively except in the .41 Magnum loadings for a D.E.
For those loads I use a Redding taper crimp profile die for the crimp. It is an excellent die as well and am pleased with the chronographed consistency of the loads produced.

JT
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Old April 20, 2014, 11:13 AM   #5
skizzums
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okay, thank you

was really just asing if one makers crimp would be better or more consistent over the other, but if a crimp is a crimp, ill just stick with lee

THANKS!!!!
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Last edited by skizzums; April 20, 2014 at 11:27 AM. Reason: speeling/typoos
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Old April 20, 2014, 01:38 PM   #6
skizzums
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i just noticed this was in competition shooting instead of reloading, sorry bout that
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Old April 20, 2014, 07:12 PM   #7
James K
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When a case is supported against the firing pin blow (headspaced, if you prefer) on the case mouth, as with the 9mm Luger and the .45 ACP, a roll crimp can lead to soft support and erratic ignition, which in turn leads to inaccuracy. That is why a taper crimp is preferable for such calibers, since it allows proper support on the case mouth.

Jim
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Old April 21, 2014, 03:23 PM   #8
k4swb
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Remove the seater stem from the seater/crimp die and just use the Lee die for crimping.

Now spend a little more and get a GOOD seater die from someone that knows how to make a seater die. Lee does not.
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