I'm down to my last 50-round box of S&B FMJ; after it is gone I'll be into my domestic inventory (Winchester, Federal, etc). In order to stretch out my limited inventory of domestic .45 ACP ball ammo, hereafter I'll be charging each of the 7-round range mags with 1 x Taiwan ball, 2 x domestic ball, 1 x Taiwan ball, 2 x domestic ball, then topped off with 1 x Taiwan ball (in other words, 3-rounds of Taiwan ball per mag mixed in with 4-rounds on domestic ball, spaced out to minimize any possible hint of nuisance range smoke).
I really like this old Colt. It is my favorite knock-about .45 ACP shooter. It is gun full of fun.