Hey I'm new to 1911s, I'm a SIG fanboy and never had any issues with P series pistols, but I bought a SIG 1911 saturday and am having nothing but issues. What do I need to do to make it run right. I'm getting Failure to Feed on JHPs (Ranger, Hydrashok, WWB JHP), with my reloads 230 gr Plated HP 1.20" COAL 5.4gr HP38 tamper crimped to .468" (runs in everything else), and WWB hardball. Mostly it is in the 1st two rounds of a mag and sometimes mid mag. I've got the two factory Checkmates and two 8rd Mecgars, ( EMT, Metalform, and CMPM are on the way to try) there doesn't seem to be any pattern of FTF emerging. the first 250-300 rounds it was around 10% of the time, then it smoothed out to about 3 or 4% until the 550-600 round mark and it went back up. I'm hoping it was because it was dirty. I shot a lot of hardball to break it in and while it was dirty I was using Ranger and Hydrashok.
From research so far I've gathered SIG 1911s have very tight chambers. What can I do to overcome this? Heavier spring? Full length guide rod? When the gun jams up the round it pitched up and it appears to be catching on the top of the chamber. Is is actually catching there? or is it bouncing off of the feed ramp? also 5 or 6 times out of the 700 rounds I shot so far the extractor wouldn't engage the cartridge rim. Ill try to post some pictures of the FTF if you guys need it.
What do you guys do to make your 1911s run?
ETA I don't want to send it back to the factory. I'm a SIG armourer and am competent at working on guns I just don't know what stops up 1911s to fix it
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Update: A buddy of mine was a closet 1911 guy advised it was most likely the firing pin hole being too sharp. Sure enough after marking the top of the round with a sharpie when it would hang up, there would be a little semi circle indent in the rim from the firing pin hole. I used a carbide bit and chamferred it a smidge. Now it runs like a raped ape and fed an additional 250 rounds without a malf!