I, too, found that RL-22 was like Norma MRP; however, I read one person say they are the same. I wouldn't agree with that. They are not exactly the same; the RL-22 is a little bit faster burning power. On one of the charts that I have access to that lists burn rate of 1 to 266 powders, it lists Norma MRP at 233 and RL-22 at 237. Actually, Win 785 is listed at 238. So, I would say that Norma MRP is "similar" to RL-22, but I have used both of these, and call me a nut, but my barrel "feels" hotter than the RL-22 than on Norma MRP, but just a "smidge." Which one is more accurate? I know RL-22 is a great choice, but I have been shooting my CZ 550 in 6.5x55mm for 4 years. After my first season with it on the range, I sold my 30-06, my .270, and my 243 WSSM. RL-22 was what I started with. Right now, I am actually in a duel out between powders. I just may jump to the Finns on powder.

Last edited by Alaska65SE; 07/16/15.