Stumped!

Ok fellas I have been stumped. I may have had this issue, but not realize it till now. Any way I am bumping my shoulders back .005" on my .223 loads. While doing a spot check I ran across a case that was only bumped .003". Being caught off guard I checked all 1k cases, and had 5 that only bumped .003". I have tried resizing them again using imperial wax, and neck lube to be sure I'm not pulling them back out when the expander pass through. What do you think could cause this? I loaded all five, and they chamber/shoot fine.

Did they measure the same after the second sizing?

Click to expand...

Yes they did. They never changed. I loaded them, and shot them today without issue. I know they will fit my chamber since they are bumped .003". Just odd I have .002" difference between those five, and the other 995 cases I resized. Like I said, this could have been happening all along. I have loaded no less than 70k rounds the last 4-5 years without a failure. Didn't know if anyone else has ran in to this.

And these are all same headstamp cases?

Click to expand...

Yes. They are all Federal FC with the crimp pockets. I clean up the local sheriff range, and they practice with Federal. All cases came from their M4's.

They were all checked with a Wilson case gauge, and double checked with a Hornady head space gauge, and compared with the others.

...they chamber/shoot fine..." That's what really matters. Two thou will not make any difference to anything. Especially with 5 out of 1,000.

Click to expand...

Yea they seem fine. Just caught me by suprise a little. Didn't understand why they wouldn't bump back like the rest. I think I will aneal them since I shot them, and resize again. Heck I may have a hand full of loaded rounds the same way. I'm not going through 8k rounds! LOL!