I'm using plated and FMJ with a dia. of .355. If I was loading lead at .356, the Blazer would probably be ok.
Yeah, I guess that extra thou is making the difference.
. Think you meant bigger, not smaller. In my experience, you need at least .002 to .003 for acceptable neck tension.
Yup, nothing proof reading might have fixed!
The 9mm is a high pressure round to begin with, so setback can lead to over pressure, particularly if you are at the upper end of the load range. Not trying to cause any unnecessary worry here, but it is something to test for and be aware of. Even with the Blazer brass I am having the "problem" with, I could probably load it and shoot it with no problems, assuming it only gets cycled once. But when it comes to reloading, I don't like relying on "probably" and assumptions.