STW,I load 81gr. re25 in my mauser action 7STW behind 150gr. nos. bt. I am getting 3400+fps. The rifle has a 27" Douglas air gauge barrel. I also use Winchester large rifle primers. With this load I can cover three shots with a dime. Remember this is safe in my rifle, so start lower and work up. I have tried a lot of different powders and this gives the highest velocity with the best accuracy. I also load the same with the Nos. 160 par. Hope this helps. Good luck. fws