"By the way, how do you cut down the .45 Colt brass? I have a tubing cutter (used for plumbing or automotive purposes). Do you use something like that"

There may be other ways, but one time I had several hundred .32 H&R Magnum cases I wanted to shorten to .32 S&W length. I made up a simple jig (actually a block of steel with a hole in it) and used a Dremel tool and cutoff disc. It worked very well, and is fast. I have made many .300 Savage cases out of .308 brass, and have used a tubing cutter to shorten the necks after resizing, and that works well also. But a .308 case is a lot easier to hold than a .32 Mag. You must use one of the miniature tubing cutters.