New mags, and new type of ammunition...without going through the entire thread, here are some thoughts.
How's the ammunition shoot through your other 1911's? Can't recall if you've posted before regarding your use of 1911's.
Does the pistol itself have an overly tight lock up? Lug length, hood fit into frame etc. I'd these types of fitting problems would have been evident prior to your current use, however. Also try it without the buffers....
One of my .45's, a Sig, had similar problems with HP ammunition but would feed fmj's just fine. On close inspection, it had a feed ramp that overhung the mag well by just a hair; allowing the rounds to impact on the feed ramp's lower lip causing malfunctions.. As I recall, Kuhnhauesen says that there should be a 0.020" gap between. Ie. the top of the forward frame/mag well, should not overhang the lower lip of the feed ramp. In my case, I could improve feeding by changing the OAL of the ammunition by 0.010" to some extent, but eventually, I sent the gun to Sig and they fitted a different bbl. to it.
But back to the ammunition; do the rounds pass the basic "plunk" test that reloaders accomplish for overall length, round sizing and amount of crimp? And will the rounds chamber while hand cycling the slide? Another check would be comparing the loaded ammunition specs to SAAMI requirements. Specifically, the dia. of the case mouth & bullet dia.
HTH's Rod
Sadly this is the only 1911 I have right now, in fact the only 45 ACP I have right now. I have been trimming pistols over the past few years as my free time has rapidly eroded.
Yea as mentioned above they pass the plunk test just fine. I’m not sure if I have tried slowly chambering a round, I’ll check that out.
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