In my experience the most frequent cause of malfunctions in the 1911 is ammo related. Recommend dropping EVERY reloaded round into a cartridge gauge such as L.E. Wilson. If the round doesn't fall freely and completely into the gauge, fix the problem. The most frequent problem is slightly oversize bullets and maybe a Lee FCD can fix that occasional problem. If its a chronic problem, measure the diameter of your bullets. The next most frequent cause is a burr on the rim. If the round doesn't completely sit flush with the gauge, turn the round over, insert the rim into the gauge. If the rim fits, the problem is on the other end. If the rim doesn't fit, rotate it down into the gauge to remove a burr, then drop it nose first into the gauge. That will usually fix a slightly damaged rim.
The second most frequent cause is either magazine related or pistol related, assuming that you've dropped the correct amount of powder. Dirty magazines, deformed feed lips. Dirty pistol, incorrect spring strength (either too strong or too weak).
Enjoy sliding!
Agreed - I had issues with the new magazines I bought for Wild Bunch (Mecgar) with my Les Baer. I'm now ordering some Chip Shooting Star mags to replace then. They work fine in my Colt Commander but not the Baer.