Re: Cow Fireforming and muzzlebrakes
The cream of wheat, frankly, is a bad idea. My opinion. It gets into everything; some of it doesn't exit, rolls back down into the chamber, sticks to the sides and makes dents on subsequent chambered brass. Can also get into your locking lugs and trigger, if you are not careful. You should have compressed air handy to blow it out after every few firings. Adding the tpaper, can't see what that will do, besides keeping the cow from falling out? But, it won't fall out if you elevate the barrel.
Therefore, I have found, (if this is the method you choose to fireform), that you just use your surplus fast powder in whatever amount seems to work best, and wad up a little tp, stick it in the neck, which will create a small pressure buildup, and <font color="red">forget </font> about the cow.
Otherwise, full power loads with bullets are fine, if you are not concerned about using up a portion of your barrel life with substandard performance?
The option I really like is having your gunsmith cut a chamber in a junk barrel, <u>using your same reamer</u> and installing it in a "loaner" rifle. You don't even need a scope, just go to the range with 100(?) loaded cartridges, and shoot rocks downrange. In an hour, you are done, perfect fireformed brass and then you gratefully return the loaner. Works for me.
Good hunting. LB
PS muzzle breaks are generally removeable(?) I don't understand why is it important to use one when fireforming without bullets?