Thanks for the input gents. I do not have any RL 15 on hand at the moment but do have IMR 4350 and H4350. I would appreciate any additional load development reports and I will forward what my rifle likes the best. I did send a request for data to Don at loaddata.com and he said he would get back to me with what he could find. D'Arcy Echols told me that the last 4 375 H&H that he built and did load development for with the 350 Woodleighs liked IMR 4350 the best at 2350.
