I prefer it to Remington brass
Did you have a problem with RP brass? I'd really be interested to know why you prefer PMC to it? The only brass that's cheap and easy to come by that I'd rate on the same level of reliability in feeding as RP would be WW or Federal. I've heard Remington is a bit thinner and that may or may not be a bad thing. Having not miked it I can't say.
RP has always had a rep for being small, even the military stuff, just what we need for feed reliabilility in auto pistols, particularly the 1911 that has a little less of a straight shot into the chamber as other pistols.