[mrappe]

Yes, the frame on a Remington should be keeping the cylinder back from the rear of the barrel a set distance. In my experience, it is usually the cylinder/frame bearing point and/or pin on a Remington that will get sluggish, rather than the cylinder against the rear of the barrel. The cylinders on Colts, on the other hand, are free to push up against the rear of the barrel, and "sluggishness" will more often be due to this with them rather than anything having to do with the cylinder pin.

I beleive that you are coccect, there is almost no gap there and any leading/powder buildup may gum it up.