Re: cold barrel shot vs group
Couple of good points. My LR rifle shoots dead on verticaly but 4" left on clean bore cold bore. After that fouler it is good to go every time, cold or not. I think every rifle has its own personality. Mine also seems to be fine shot dirty, 50 plus, or cleaner less than 5....it's just that first round that does it.
....is it consistent? Here is my thought. If I shoot 1 round and it is dead on at 500 yards but the rest are not then I have a 1 round rifle. Such as Mudrunner, which he is changing. That means no follow up shot or multiple target shots. Seems no good to me either. So I don't personally care about a clean bore, I care if the bullet goes to the same spot consistently. When I go out shooting rocks my first round to my 20th need to be hitting the POA.
One thing I like about a rifle that works dirty is that you can be out hunting and still practicing. A couple of weeks ago I let the boys shoot at 1220 yards after we spotted several deer at that range. It was a perfect opportunity to bring practical knowledge to the table. We shot a rock and discussed the reason we didn't shoot at the deer. What I know is that after those 5 rounds my next 5 will still be dead on. Plus with a couple of 16 yr old boys they want to shoot things and goof off too. Works for me : )