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Old October 15, 1999, 12:26 AM   #1
Join Date: October 10, 1999
Location: Indiana
Posts: 61
I currenty load .45ACP with 200gr SWC cast bullets.(my own) 4.9 gr of W231. I've been roll crimping almost from the beginning almost 5 yrs. ago. Without it, sometimes I would expierience feeding problems. A friend suggested roll crimps might help. It did. Now my old 1911 seems to be getting looser and looser. Do I have a pressure problem here?

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Old October 15, 1999, 10:55 AM   #2
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Join Date: July 29, 1999
Posts: 140
All autos should have a taper crimp. If you are using the dillon dies you already are using the taper crimp. I suggest the Lee factory crimp die. It sizes again as it tapercrimps, so if you should compress your brass as you are seating the bullet, it will be correctly sized. I know I feel much better shooting my reloads using this die. BTW it only cost's $12.47 from midway, what do you have to loose, but headches?

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Old October 15, 1999, 02:37 PM   #3
Join Date: October 14, 1999
Location: San Diego, CA. USA
Posts: 51
I've read that roll crimp is not needee and not recommended. RCBS and a few others do not make roll crimp for 45ACP. Go to and ask the experts....hope it helps you. Steve
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Old October 17, 1999, 04:24 PM   #4
Join Date: October 15, 1999
Location: Toccoa, Georgia, USA
Posts: 36
It's been awhile since I thought about this type of question but You definitely do not want to roll crimp a semiauto case. It can cause headspace problems because a semiauto usually headspaces on the case mouth, whereas a revolver cartridge headspaces on the case rim. In answer to the possible pressure problem, I would suspect there is. A roll crimp bites into the side of the bullet, holding it in place for a longer duration and raising peak pressure.
When you taper crimp, the die firmly squeezes the case neck around the bullet and not into it. It can also affect accuracy. I agree with "10mmrules" and get that taper crimp die. Your cases will last longer and best of all your gun will last longer.

[This message has been edited by preacher (edited October 17, 1999).]
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