I've been using the excellent Pat Marlin tool to create plain base gas checks for my 357 magnum Lee cowboy bullets. I usually shoot about 200+ rounds through my rifle each time I go to the range, and making 200+ gas checked bullets is really tedious and time consuming. I was wondering if the process would be any easier if I would switch to a bullet that was designed for gas checking. The part of the process that really slows things down is the fitting of the gas check to the base and keeping it in place until it is inserted into the lubesizer.