I really like Retumbo since I have just started using it. This really is a versatile slow burning powder. I have noticed in doing some research that it is being used with many cartridges and even though in some cartridges it does not give the best velocities (in some it gives the best) but it ends up much of the time being the most accurate or very accurate at the least. What I found fascinating was that few were using it in a 300Wby to push not 200gr plus bullets which it does well but to push a 180gr bullet using a starting load of 87grs and working up with good accuracy results and not shabby velocities. I know that Retumbo is relative new as far as powders go, but I think it is due some experimenting and we all might have some pleasant surprises. What is your take on Retumbo? Also what have your discovered in using the powder besides the fact that when you get to max it is immediately at max, which is not such a bad thing when you think about it?