Excepting 1911's, the only non factory magazines I use are from Mec-Gar. Mec-Gar makes a large number of the factory magazines these days anyway, SIG, Beretta, FN, S&W, Springfield, etc.......
National and Promag, and the word quality, should never be used in the same sentence. If lucky, and you only need them for play, go ahead, but for any serious work, I would not touch them. Primary problem with ProMag is the poor quality steel used in the magazine body. Lips will wind up spreading, usually sooner than later.
I found Promag not reliable enough to compete with in my SIG 220 back in the early 90's.
AS to 1911's I use, in my preferred order, Virgil Tripp's Cobra Mags, Chip McCormick's CMC power mags, and Bill Wilson's 47D's. For 9mm it is all Virgil's Cobra mags.
I haven't tried Bill's new magazine yet. Or for that matter Chips new PowerMag Plus either. Virgil's mags work so well I haven't needed to.
I do have 6 Metalform magazines that were custom tuned specifically to my Springfield Professional, but I use Virgil's magazines for competition and CCW/EDC. The Tripp's are more robust than Metalforms, although I know a bunch of folks that swear by Metalform.
My CCW/EDC Colt 21st Century Commander is only stuffed with Virgil's pride & joy.
I don't like anyone's 10 rounder much. If forced in a corner though, I would go with Chips 10 round Powermag.
"Mindset-Skillset-Toolset" -- Col John Boyd who gave us the "OODA" concept
“To lead untrained men in to war, is to waste them.” - Confucius
“We can evade reality, but we cannot evade the consequences of evading reality” - Ayn Rand
Stupid should hurt
Last edited by Chieftain; 06-20-2011 at 10:28 AM.