[The picture in post #19...
#6?
[The picture in post #19...
I rarely trust single photo views anymore.
The picture in post #19 may provide you with a clue. The breechface is mis-machined. There's a step that will hold the rim off the breechface on one side and keeps the rim from immediately reseating the primer. The primer leaks high temp gas under pressure and erodes the steel. Then, the step is swaged into the case rim. The question right now is...how deep is that step? How far from the surface of the step to the surface of the breechface...and the second question...Is your headspace being measured from the step...or from the actual breechface?
Yep...and beside Federal. The two marks appear to be identical marks on a twice-reloaded case. When they first jumped into the 1911 market, Smith & Wesson had the same issues with several breechfaces. I've seen it occasionally on recent Springfields.
FullEffect1911, What is the lot number on your Winchester primers?
full effect,
As you know from your own manuals, those loads you listed are NOT hot loads. They are in the mid-range.
The problem is NOT ammo related. I've reloaded cases of scores of headstamps scores of times with never a loose primer pocket. I can't actually recall a case of a loose primer pocket in .45ACP. And, cleaning the primer pockets on .45ACP is, like practice bleeding, a total waste of time.
The problem IS, therefore, the slide as some have already indicated. I just checked a couple of .45s that are high mileage and have had everything run through them. They have a shiny circle on the bolt face that mimics the outline of the primer, but no, not any at all, not even a little bit, degradation of the steel at all. Bad slide. Get Springfield to fix it.
http://www.thehighroad.org/showthread.php?p=7651057#post7651057My last 1000 WLP primers functioned perfectly! My new lot of 1000 WLP primers damage my revolver as they pierce and firecut into my recoil plate. I sent Winchester $5 worth of bad ammo to fire, in the hopes they'll say it's bad, and send me another lot of primers which may-or-may-not be any better, which I'll probably unload on craigslist since I can't trust Winchester anymore.
Like i said, defective primers.the breech face erosion is due to the rounded edge of the primer cup cracking and leaking.
as it turns out it the breech face erosion is due to the rounded edge of the primer cup cracking and leaking. So the primer pockets are not loose and the gun is good, it is just a poor lot of wlp primers.