For about 25 years I've used nothing but the old surplus 4831 in my 270. No complaints really, but Ive been trying some different powders lately trying to improve ballistics. With h-4831 sc and h-1000 I could'nt get any more velocity than the old surplus powder. I usually load 150 partitions and with the stated powders I average about 2790 f.p.s. from my 22 inch barrel. Have any of you guyys used r-l 22 with 150's and how did it perform?