I understand that mags can fail when they're dropped on hard surfaces...like the concrete floors at the range I shoot at about 3 times a week...but over the last 10 yrs or so, I can only think of 2 or 3 mag failures from dropping a mag out of a 1911 - and those were all Les Baer supplied mags - with cheap spot welded base plates that failed ( and I've since tossed all of his mags out ) --- and in shooting about 400 - 500 rds a week typically, I can only recall those 3 failures from dropping mags on concrete floors / and never with a Wilson Combat 1911 mag.
I practice my reload drills almost every range trip....( Wilson 1911 ETM mags in 9mm and .45 acp ...with the larger ETM base pads on them )...and I run reload drills all the time.... ( ... like draw - Fire 3 - reload - Fire 3 - Reload - Fire 3 with a par time of around 10 sec...).../ and while I typically have 7 mags with me at the range ( I don't count the number of times each gets dropped / they each just get mixed into the course of fire )...
Yesterday afternoon, I ran that drill ( 3 + 3 + 3 ) 4 times at 5 yds, 4 times at 6, 7 and 8 yds....so most every mag hit the floor 4 or 5 times at least..( out of the 32 times I dropped a mag during the drill )...and about the only thing I do when I pick them up, is make sure the base pad has not come loose...
I would rather the range - had anti fatigue mats on the floor...in the firing stalls - but as a heavily used indoor range in a fairly large metropolitan area...keeping them clean would be way tougher than the concrete floors..../ and the general training bay ...where we can move between targets, etc...its not practical to put mats in the entire 25 yd X 15 yd bay.../ so I accept dropping mags on a concrete floor - as just part of the best facility I have around !
So I don't worry about it ...when I carry, I will carry 3 out of the same 7 mags I use at the range - and that's also why I have 2 extra mags on my belt ...in case one does fail. I carry one of the same 1911's I shoot every week - with the same ETM mags...( 5" Wilson 1911's ) in either 9mm or .45acp....
I think all of those mags I use now are at least 5 yrs old ....and If - or maybe when --- 1 or 2 of those 7 mags fail / I will toss them all out -- or give them to someone ( like one of my adult kids ) that don't carry - and let them use them as "range mags" and replace them. I have at least 3 more new mags ...ready to go, in storage, if I need them ...and I'll just order a few more....( a few hundred dollars in mags every 10yrs or so, is not a big deal )...