Lettow,
Yes, it may fully seat a crimped bullet, like my 2001 44Colt OP, but will it fully seat a sized 44 spec empty casing? My 44 Colt marked OP would not fully seat the empty 44 spec casing therefore it was not safe to fire 44 Spec's. It was specific for 44 Colt and 44Rus, only.
I hope that is not true with these newer American models because I want a 44 spec but will mainly shoot 44Rus. But want, the full compliment of 44's to work through it, if I like.