I use BH209 so I just blast away as much as I want. But what I'm going to do next time is this.... Fire that initial bullet on a clean bore with 1 fouling primer. Then swab the bore clean and allow the barrel to cool. Then fire again and repeat the process until I get a good group at 100 yards. That's how I plan to get my ML dialed in for hunting since I will be making the kill shot with a clean/cool barrel and 1 fouling primer.