I was at the range yesterday and found that from 90 to 92 grains of powder I was not increasing the bullet speed but by 50 feet. It went from 3090 to 3140 but I was increasing the fireball I threw. It seems to me that I was only burning more powder out front of the rifle. I switched to R22 and at the same 92 grains I increased the speed of the bullet to 3650 and was not throwing a fireball at all. I just wonder what anyone else has found using Retumbo. It seems the powder is too slow for my rifle even though it is supposed to be for large magnum rifles.