Your biggest problem is probably the .200 line on your brass is big, a small base die will help but I would be careful doing the 1/4 turn cam over to many times some dies can push the shoulder back .010 or more and to many times doing that you will be getting a case separation.
A comparator will tell you how far your pushing the shoulder back.
This post includes a valid warning and a suggestion for the proper tool to prevent setting the shoulder too far back. You'd do well to take this advice.
I shoot a Garand a lot, and if I do the "contact shellholder plus one-quarter turn" I may get 3 loadings out of the brass. Using a comparator to set the shoulder back .002" and annealing every third loading, 20 loadings are quite possible. Same with ARs.
This is done without small-base dies and the rifles run fine.
