45 acp case length

All my .45 ACP brass is range pickup. when I get a bunch I run them in the tumbler for 20 minutes or st to get the grunge off of them. I'll then size them and measure them. Anything shorter than .888 goes in the scrap bucket and anything over .890 I trim.I do separate by brand. hdbiker
 
Alright heres what i did. I dug the short ones out of the scrap container and found 2 long ones and two nominal ones.i loaded one of each with a bullet seated to 1.205 (col provided by powder manufacturer) and 1 of each to 1.230 which is the col provided by reloader magazine. Bullet manufacturer has no data onsite. I then did a plunk test on each dummy bullet and recorded pass/fail. Then i reassembled gun put one bullet at time into magazine and chambered the round noting pass/fail. Then i manually extracted again noting pass/fail.
And the results:
1. Long case passed plunk and extraction test failed load test
2. Nominal case passed all 3.
3. Short case loaded to 1.230 failed plunk test passed extraction amd load test
4. Short case loaded to 1.205 passed plunk and load test failed extraction test.

I think the problems i was having was a combination of all factors, a perfect storm if you will, with the most important being bullet shape.
Again i thank everyone for their help.
 
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