blackd24
Member
- Joined
- Feb 28, 2020
- Messages
- 375
Can too much crimp cause copper fouling? I am running hoppes no 9 bore cleaner and it’s coming out green. Red copper streaks in the barrel so there isn’t a question of if, it’s why.
I’m loading starline 357 brass with 7 grains of BE-86. Using both hornady xtp and precision delta 158 FMJ. I noticed it mostly with the XTP bullets. Chronograph says an average of 930 FPS out of a model 19 classic 4 inch barrel.
I cannot put a bullet into the fired brass, when it should drop in freely. I can still see a noticeable crimp in the brass after it was fired which leads me to think I am crimping too much for this load (stripping the copper and leaving deposits in the barrel). A few pictures attached above. Another consideration is the potential of shooting some undersized coated bullets previously and not removing leading so copper is sticking to the leading in the barrel?
Any ideas?
I’m loading starline 357 brass with 7 grains of BE-86. Using both hornady xtp and precision delta 158 FMJ. I noticed it mostly with the XTP bullets. Chronograph says an average of 930 FPS out of a model 19 classic 4 inch barrel.
I cannot put a bullet into the fired brass, when it should drop in freely. I can still see a noticeable crimp in the brass after it was fired which leads me to think I am crimping too much for this load (stripping the copper and leaving deposits in the barrel). A few pictures attached above. Another consideration is the potential of shooting some undersized coated bullets previously and not removing leading so copper is sticking to the leading in the barrel?
Any ideas?