I worked up 4 different sets of test loads last night and shot them today. For now, just 1 round at each charge level so I can figure out where I want to concentrate later. All loads shot at 25 yard distance.
240gn Bayou coated bullets, BE86 powder. Charge range 10.6-11.8. The whole charge range hit very close of POA . The upper charge was within 150fps of the velocity I got with 2400, so I think I have a good inexpensive plinking load that still has a bit of a magnum feel to it.
240gn Bayou bullets, 2400 powder. Charge range 18.0-20.0. The highest charge gave a velocity of 1425fps. I was worried that I might be pushing these coated bullets a little hard, so I shot them last so that I could see if there was any fouling or leading in the barrel. I cleaned the gun when I got home and everything looked good. The 3 highest charges all hit very close to one another so I think I will go with the mid value and call it good.
240XTP, 2400, charge range 18.5-20.5. The lowest 2 charges were a little scattered on the target, but the upper charges were better. No pressure signs, so I may work up a little higher.
300XTP, 2400, charge range 15.5-17.5. All of these loads hit a little high, which is expected since the scope was zeroed with lighter bullets. But all the charges hit close to one another, and the highest 3 charges all hit within 1" of each other, so I think I have will play a little more with this charge range and find my accuracy load.
I still have some more work to do, 1 round at each charge level is not sufficient, but at least I now have it narrowed down to smaller charge ranges to explore. I also want to work up some loads with N-110 and perhaps 300-MP.