What I would do is..

Boil the barrel first. Then while it is still hot, use a brush and solvent and scrub the bore. Then some solvent patches. After that oil the bore.

Check the sights and make sure all the screws are tight. It sounds like your not a beginner in this sport. When I go to the range, I would sight the rifle dead on at 50 yards.

Now once it is dead on at 50 yards try it at 100 yards. See if the load still wants to climb. There is really no reason I can think of that it would be shooting that high but then there always seems to be a surprise with that rifle.

See what it does when it is sighted in at 50 yards. It should be a couple inches low at 100 yards. If that is the case, sight it in one inch high at 50 yards then do the same thing all over again.