Why not try h335 with your 69 grain bullets.That is what shoots best out of mine.The other thing is to have the bore scoped in case it is so rough that it will never recover from poor machining.You might know but sometimes it takes alot of rounds to settle those barrels in.It shouldnt but have heard that 2-300 rounds can do it.I would try tubbs final finish if the factiry wont do anything for you.It works quite well smoothing the high spots off.Dont use final finish if you think you might get a warranty claim on it.