I had good results with RL-22 and Retumbo in a 6mm-284 with 105 berger hybrids, 107 SMKs. 115 DTACs shot okay but not as accurate with same two powders.
Recently switched to RL-33 and 105 hybrids with a velocity boost over the other two powders with excellent accuracy.
RL-33 might be worth trying in your slightly smaller case with the heavier 115 grain bullet.
