Get your 1911 up to Combat Reliability by turning in GI Mags and upgrading to Wilson Combat 1911 Magazines. Wilson magazines will increase feeding reliability and increase your 1911s ammo tolerances by properly aligning each round with the chamber and avoid nose dives and failures to feed. 7rd magazines are standard for 1911s, but you won't have any problems upgrading to the 8rd magazines which will not through the balance of your pistol off. The Wilson ETM Magazines are the toughest you'll find at $32.99 each.
The 1911 was designed for blasting bag guys that after the Philippine insurrection when the revolvers of the time were puny and ineffective. Tell our modern Military that 9mm sucks now and it sucked then. The bag guys fell to hardball and Wilson Combat Magazines are hands down the most reliable mag you can run your 1911 with.