Franc;
I am following what you mean now. I have not actually tried that so not positive if you could get a good roll crimp with whats left of the folds or not. Another option that was discussed a good bit some time back but haven't seen t mentioned lately is the "Hardin" crimp. For this you cut the 2 3/4" hull down to proper length then load as normal a load of proper intensity from a 2 3/4" menu. Then place a top wad on & run through the regular fold crimp stations. Supposedly this will make a secure crimp with a big hole in the center. quicker & easier than applying the roll with no extra tooling required except for cuttin the hulls.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra