Seating bullets out reduces the pressure if the powder charge isn't changed. If you quench hardened your WW bullets they have lost a dramatic amount of hardness, but if you air cooled on a pad and let them pile up, the hardness is normal and probably didn't change. If that was your cooling method, in the future, when cooling on a pad, keep the bullets well spread out till they are cool, and preferably have a small fan blowing across them, which will increase hardness without the hassle of water quenching. If you consider quenching to be a hassle. The most hardness stable bullets one can make are air cooled, and hardness will hold for many years. Quenched WW will suffer hardness loss quite dramatically if stored in a hot place, but shouldn't lose much in two years in a cool basement.
However, I believe your previously untested Blue dot load is the main culprit, with perhaps the relitively high temperatures be a second possible problem.
I've never lived with the curse of having to drive to a range, but have always had a property where I can shoot out the back door of the shop, or walking distence from it. I always load only a couple rounds of a new load, 5 at most, for initial test. If driving to a range I'd load 5 rounds of what I knew was a light load. increase the load slightly and load five more, etc, etc, till I got up to what I thought might me the power I wanted or max. Start shooting the light loads and quit with the lot that causes leading or blows accuracy. Pull the remaining bullets when you get home, and you'll not have such a problem again in the future. One problem though with pulling cast bullets is that gas checks normally stay in the case. If using gc bullets make sure you don't load any rounds that might have to be pulled.
You'd do better to drop the charge of H110 to get less recoil, and leading. 20 gr is a good sensible load and very stout in a 12 inch fixed barrel, and that much reduction will reduce recoil dramatically..
