XL105
Silver $$ Contributor
I’m having issues with chambering 9mm reloads. I cannot locate the issue.
147gr RMR actual diameter of bullet .355
OAL 1.15
Brass length .742-.748
Diameter of finished round that doesn’t chamber .388
Diameter of round that does .384
It appears the finished diameter is the problem. As you can see in the pictures, sometimes the issue is more pronounced, but the finished diameter is still .388, on both cases.
I have checked other chambers with similar results.
I don’t believe it’s a brass thickness issue, because it just seems random.
I haven’t had any issues with 115gr RMRs, but I can’t find a measurement on the 147gr that is out of spec.
What, in my reloading process am I doing wrong?


147gr RMR actual diameter of bullet .355
OAL 1.15
Brass length .742-.748
Diameter of finished round that doesn’t chamber .388
Diameter of round that does .384
It appears the finished diameter is the problem. As you can see in the pictures, sometimes the issue is more pronounced, but the finished diameter is still .388, on both cases.
I have checked other chambers with similar results.
I don’t believe it’s a brass thickness issue, because it just seems random.
I haven’t had any issues with 115gr RMRs, but I can’t find a measurement on the 147gr that is out of spec.
What, in my reloading process am I doing wrong?

