I noticed this when I was cleaning the Kimber with the aluminum frame this evening. Look at the worn area on the frame, just below the barrel ramp. It looks like something is peening it pretty bad. I put another 100 rounds through it today, Winchester 230-gr JHP, with seven different magazines (3 Wilson 47s, a Novak, a Pro-Mag, the original Kimber, and a Les Baer) and only the Kimber and Novak had metal followers; the other five had plastic followers. So what's causing this wear?Below on the left is the gun on Feb 1, and on the right is the gun today, with 720 rounds through it.I blogged about this three weeks ago, with only 100 rds through the gun.
Edited to add: the Witness with the 38-Super upper ran faultlessly today and sent 150 rounds downrange without a complaint. The Springfield nine had half a dozen failures to extract; tough to clear, 'cause I had to lock the slide back, drop the mag, rack the slide to eject the spent shell, lock the slide back again, insert the mag and release the slide to chamber the next round. Oh, well. Malf-drills are part of it, too.