Ruskin,
The hardest thing to do is shoot in a load without getting the barrel hot. I have found if you will take a couple extra plinkers say 22 lr with you and do a shot or two then plink for a few, Makes your time go a lot faster. I know there is 60 mins in an hour but it seems like a lifetime when you'r waiting to take that next shot. It works for me. Good luck.........Joe........