my best guess

**joeyj** · June 22nd, 2016, 05:38 PM

Cleaning around my bench I found 29 pieces of brass -9mm- that got pushed behind something else. I checked them on a wilson gauge and they all said OK. I reloaded them and rechecked them and 7 of them had no intention of head spacing OK. My best guess would be the brass bulged out during the pressing stage. I only saw one that looked bulged by the rim. What do you think?

**Bang** · June 23rd, 2016, 01:38 AM

??? I think I'll give up and go to bed.

**awfroadan** · June 23rd, 2016, 08:52 AM

How are you crimping them? If you are crimping with the seating die make sure it's not trying to crimp before the bullet is fully seated.

**MT1** · June 23rd, 2016, 09:31 AM

Originally Posted by joeyj

Cleaning around my bench I found 29 pieces of brass -9mm- that got pushed behind something else. I checked them on a wilson gauge and they all said OK. I reloaded them and rechecked them and 7 of them had no intention of head spacing OK. My best guess would be the brass bulged out during the pressing stage. I only saw one that looked bulged by the rim. What do you think?

What do you mean by the "pressing stage"? Resizing, seating, or crimping?

**Fred762** · June 26th, 2016, 06:25 PM

Originally Posted by joeyj

Cleaning around my bench I found 29 pieces of brass -9mm- that got pushed behind something else. I checked them on a wilson gauge and they all said OK. I reloaded them and rechecked them and 7 of them had no intention of head spacing OK. My best guess would be the brass bulged out during the pressing stage. I only saw one that looked bulged by the rim. What do you think?

I used to have trouble w them pesky 9mm cases..until I bought a 'undersized 9mm resizing die online'..I 4got where I bought it, but it draws'em down a tiny bit smaller than a std 9mm die and seems to resize down closer to that extractor groove..where I USED to get small bulges in some cases. I'm retired and have more time, so I mic every 9mm case after resizing to make sure it is within a couple 1000ths of an average of 10 factory cases AT the groove. Since I have been doing these things I have reloaded a couple 1000 9mm mixed cases w/o much trouble..other than tossing out a FEW which were out of acceptable diameter at the groove. No problemo w head spacing since that. ;-)