are you "push....pulling" straight out, or "opposing, across the chest, one hand opposite of the other"... are you cocking back the hammer first?,.. so as to not have to work all the parts against each other.......can't see you or just how you are doing it, or maybe you are getting older like many of the rest of us and harder to do these things....our SR1911 is not any harder to cock than any of the other 1911s I have had and used, and shot over the years , maybe my older 1967 NM Colt is the easiest, it has a 16 pound recoil spring and shoots wadcutters, I retire it after all those years ( since 1967) and now use the SR1911 ,one of the first ones that even came with rust spots under the grip panels,( stainless no less) but as I said it is just fine.........practice, practice, practice
and yes, we have found over the years the stainless steel guns may be a harder to operate as "like alloys of stainless can grate, gall" one reason many years ago Randall made the grip frame one type of alloy and the slide another alloy" quite costly they found out...use to lube them with vegetable oil...put that one out on the internet...tooo long ago and too detailed for me to even remember and I never was a "metallurgist"........." and so it goes, Wil Terry" RIP