Alliant�s powders seem to have an erratic burn rate they have had some warnings of late about fast lots of powder. I like them but be careful to use good reloading techniques when using them starting low and working up. I like RL 22 and 25 in my 8MM Remington Magnum along with Sierra 220 Gr. GameKings. The boat tails have less gliding metal touching the rifling and I found an extra 100 fps over other non Boat Tail type bullets. The RL-22 77.5 Gr. this is .5 over max but shows no signs of pressure in my gun shoots the 220 Sierra at 3006 fps. The RL-25 at 84.0 Gr. shoots the 220 Gr. Sierra at 3056 fps out of my gun. Using heavy bullets I�d be very cautious working up my loads. But both of these shoot very well out of my rifle. I have never chornographed this same bullet in my rifle above 2900 fps without signs of pressure using 4831. I still have the 24� factory barrel.