I' ve got a stainless ruger 7mm mag. I gave up on the sierra' s. I couldn' t get any consistant accuracy with them. I' m currently using 68.5 grains H4130 with Nosler 140 bt' s and I' m really happy with my groups, 5 inches at 400 yards. That' s a load I worked up to in 1/2 grain increments. At 69 grains, I start running into bolt opening problems so be carefull if you try this and work up to the load that works best.