showmebob
Member
After trimming all my 357 mag cases I reset my dies for a slight roll crimp. I am using Berry's plated bullets that probably should have a taper crimp instead of a roll crimp. I don't want to over crimp heeding a warning about cutting through the plating and causing a possible separation. Yesterday at the range I measured a round and placed it in the #5 position. I then shot the first 4 and removed #5 and remeasured it. I did this 3 times with the following results. All COL's shortened, two by .010.
On my 9mm I am using Berry's plated bullets with a taper crimp. I followed the same procedure that I used for the 357 except the measured round was placed in #17 position. The results were the measured round COL's lengthened by as much as .006.
While I'm not as concerned about COL lengthening as shortening, my question is. Would you/should I increase the crimp? Or is this something I will have to live with with Berry's bullets?
On my 9mm I am using Berry's plated bullets with a taper crimp. I followed the same procedure that I used for the 357 except the measured round was placed in #17 position. The results were the measured round COL's lengthened by as much as .006.
While I'm not as concerned about COL lengthening as shortening, my question is. Would you/should I increase the crimp? Or is this something I will have to live with with Berry's bullets?