RE: First shot fouled barrel
In my Black Diamonds and Omega, I shoot mostly sabots. I clean between shots with the Cayugad swabbing solution, then dry patch. The point of impact is the same from a clean drybarrel as a swabbed fouled one with this routine. So I go hunting with a clean dry barrel. Dry climate, here in the west, with a stainless barrel - I'm not real worried about rust. No oil or bore butter goes in my barrels at the range - although I do store them long term with a little film of Sheath in the bore.
In the new Genesis, I'm using 2F Jim Shockey Gold behind the new 338 gr. Platinum Powerbelts. This combo doesn't settle down until you get a couple shots downrange, and doesn't like to be swabbed or cleaned in any way between shots. So I just load it and shoot it. I'm going afield with a fouled barrel in this instance. I'll clean the gun at the end of the season.