45 colt and 38 special taper crimp dies

Messages
2,948
Reactions
2,182
You can still use a roll crimp die to seat non cannelured bullets, however it requires adjustment. Taper crimp doesn't seem to work terribly well on these two cartridges as bullet setback when used in a tubular magazine is a major issue (taper crimp doesn't provide enough mechanical strength to hold up to recoil). They are probably useful for jacketed bullets if fired in a revolver, but most of these have a crimp groove, and I would recommend staying with the roll crimp.
 

ma96782

Messages
5,535
Reactions
9,677
The major mfn of dies will usually make their dies with the "proper crimp" built in. Of course you have to adjust it correctly. So as mentioned above, that would mean that revolver rounds get a roll crimp and auto pistol rounds will get a taper crimp.

But, there is also finesse involved (in the correct amount of adjustment). Getting that perfect COAL and crimp at the same time. Use of a "factory crimp die" has helped some folks. Anyway, be aware because, some folks have been known to over taper crimp so that it looks like a roll crimp. And/Or, under crimp a roll crimp so that it looks like a taper crimp.

I'll just say to crimp it "good enough" so that the bullet doesn't move when it's chambering (moving from the mag into the chamber). Also, make sure that the bullet doesn't move from recoil forces, while it's waiting it's turn to be fired.

Take caution because, over crimping can also lead to troubles with "over pressure situations."

Aloha, Mark
 
Messages
2,405
Reactions
557
The major mfn of dies will usually make their dies with the "proper crimp" built in. Of course you have to adjust it correctly. So as mentioned above, that would mean that revolver rounds get a roll crimp and auto pistol rounds will get a taper crimp.

But, there is also finesse involved (in the correct amount of adjustment). Getting that perfect COAL and crimp at the same time. Use of a "factory crimp die" has helped some folks. Anyway, be aware because, some folks have been known to over taper crimp so that it looks like a roll crimp. And/Or, under crimp a roll crimp so that it looks like a taper crimp.

I'll just say to crimp it "good enough" so that the bullet doesn't move when it's chambering (moving from the mag into the chamber). Also, make sure that the bullet doesn't move from recoil forces, while it's waiting it's turn to be fired.

Take caution because, over crimping can also lead to troubles with "over pressure situations."

Aloha, Mark
According to Richard Lee, based on some testing he did, heavy crimps don't add as much pressure as the various "legends" claim. In some cases a heavy crimp is very much desired, especially for powders that are hard to light off. The heavy crimp insures that the powder is ignited in the proper manner before the bullet starts to move. Bad ju-ju when bullet and wad of powder start to move down the barrel and then have that wad ignite.

When it comes to crimping, the best contribution to the reloading world is the Lee Factory Crimp die. This collet type die makes crimping not just easier, but far more consistent. I don't even consider crimping with a seating die anymore. Even if using a single stge, it doesn't take much time at all to run a box of ammo through the crimp die. No more bulging cases because the crimp grabbed the bullet before it was fully seated.
 

UPCOMING EVENTS

Free Firearms Safety Course Webinar (I-1639 Compliant)
Virtual Webinar (Zoom). Registration Link in the course description.
Washington, USA
Rimfire Challenge Feb 13th @ DRRC
Douglas Ridge Rifle Club
27787 OR-224, Eagle Creek, OR 97022, USA
Project Appleseed
Douglas Ridge Rifle Club
27787 OR-224, Eagle Creek, OR 97022, USA
Albany Rifle & Pistol Club (ARPC) Gun Show
Linn County Expo Center
3700 Knox Butte Rd E, Albany, OR 97322, USA

LATEST RESOURCE REVIEWS

  • Paul A Martin Historical Guns
    5.00 star(s)
    Great shop, selection and atmosphere
    One of the better firearm shop experiences I’ve had, Paul is very patient and helpful. Definitely going to be a repeat customer even though it’s...
  • Adaptive Firing Solutions
    5.00 star(s)
    Great Service! A+
    Steve is a very nice guy and very easy to work with. I've done business with him a few times and will continue to.
  • Adaptive Firing Solutions
    5.00 star(s)
    Great guy!
    Steve is a great guy to deal with!
  • HighLine Firearms
    5.00 star(s)
    Nice Home Shop
    Had what I wanted at a good price. Messaged me when in stock.
  • Adaptive Firing Solutions
    5.00 star(s)
    Excellent Service
    Steve is an excellent guy to deal with. After looking at some Form 4 items at another dealer who didnt seem interested in my money, i emailed...
Top Bottom