1911Forum banner

Maximum flare/bell Crimp die can handle on 45acp with PC

270 views 20 replies 9 participants last post by  RetiredRod  
#1 · (Edited)
My crimp die is shaving brass (pic). I realize this is because the flare is excessive at .478. I’ve been having issues with PC being damaged on my cast and coated bullets so I tried seating ONLY and separating crimp step. Should I lower a few thou or consider starting light partial crimp on the seating die? Dies are all Lee.

Brass shavings from Crimping NOT the powder coat:
Image


So what is the max flare .45 can have with sensitive lead that crimp die can handle without shaving brass brass shaving
 
#5 ·
I flare enough to not shave lead (or coating). If tiny rings of lead or strips of coating are "shaved" when seating, flare more. The tiny bits of coating your photo shows may be coming from the crimp not from seating the bullet.

My nickel's worth.
Grumpy
 
  • Like
Reactions: passx
#8 ·
Seat and crimp separately.
( I use Lee dies too)
I am using 4 die set. I get brass shavings with FCD or the crimp only die that I just replaced FCD with.

It wasn’t as bad when the seating die also did some crimp and station 4 just finalized the crimp. I want to utilize seating only and then crimp only. But based on the picture something’s wrong.
 
#10 ·
It is difficult to understand how you are getting brass shaving from the crimping process if you are NOT using a Lee Factory Crimp Die. The purpose of a (non-fcd) crimp die is to re-shape the upper case portion from a "flare" (so the bullet can be seated) to a "crimp" (either tapered or rolled into a cannelure) to hold the bullet in place at the desired OAL.
 
#14 ·
Ryan, can you give us a picture of post flare ? I had a similar issue years ago before I realized I was over flaring my brass , I reduced the flare until it was just enough for the bullet to just sit on the brass pre insertion.

On my deal it shaved some brass when I seated the bullet and then again on the crimp, reducing the flare to just enough to just hold the bullet before seating it. It also helped reduce some of the bulging I was getting just below the inserted bullet… hope this helps !
 
#18 ·
I've had this same problem with brass shaving along with sticking brass in my Redding crimp die.
At this point you likely have brass buildup and galling inside your crimp die making matters worse.

Like passx mentioned I think in my circumstance it was mostly due to over expanding. Clean the crimp die out really well, lube it with silicone spray (I sprayed a Q-tip and swabbed the crimping cone) and be careful not to over expand. I also only crimp enough for rounds to consistantly pass my guage.

I've become a fan of Dillon crimp dies for pistol, since they allow quick removal of the barrel for cleaning (out of the top) by pulling a pin and not having to reset the die in the tool head.