It's issues like this one, plus my own experiences, that make me want to drop the cash to get a certified, verfied, target proven, load already developed by somebody else rifle that'll just print clover leafs at 300 yards. Just spend the money up front and enjoy life.
But I'm too cheap to do it, so I just keep piddling arouind with my fixer upper, spending the same money for different bulltets, powders, primers, put on a new stock, etc. and working up every possible combination.
Good luck.
