This has probably been addressed before, but here 'tis again:
#1 - To test your auto for feed problems, cram as many cartridges into the magazine as it supposed to take. Lock the slide back and insert the magazine. Release the slide. Listen and look for any hesitation in the slide slamming that first cartridge home. If it's goes forward slower than without a magazine (or an empty magazine), it may have a problem. You can readily see and hear the difference. What you want is an unhindered feed. I think this is especially noticable with an 8 round clip, the ones where the spring is really compressed. I also think that if that first cartridge feeds smoothly and quickly, you're good to go. Compare the full magazine slide closure with no clip at all. (This has nothing to do with extraction problems.)
#2 -A lot has been written about "limp wrist" causing malfunctions. It's a real world problem, in that combat scenarios where you might have been wounded, or you are weak for any number of reasons, you are prevented from locking your wrist. The test is to fire your 1911 with the ammo you carry, holding the gun in one hand, and keeping your bottom 3 fingers off the grip. In other words, the gun contacts the web of your hand and your trigger finger. That is a very lose hold, so I'll add a warning to take extra care not let the recoil cause you to drop the weapon. I have owned some 1911's that were flawless with my chosen ammo, except when shot with a limp wrist.
