The 650 has no depth stop or limiting device on the priming system *if maintained properly, so it seats the primers to the full depth of the primer pocket as long as you operate the handle up properly and have it mounted to a good, sturdy, bench.
*What I mean by "if maintained properly" is that some have had the primer punch back out (unscrew) which can limit the primer from fully seating, which isn't the fault of the press if you don't look at things and make sure everything is operating properly.