Can anyone tell me what the major difference is between these two powders? I'm thinking MRP=RL22 and MRP-2=RL25. Or something close to that. I have a 257 Weatherby that I load, and the other day I got a can of Norma MRP-2, but there is just not much data on it. From what I have found so far, it looks like I can load 69 gr. MRP-2 and 115 TSX and be fine. Does anyone have any data for this powder and caliber or know a good place to look? I would greatly appreciate it.