7 WSM results with 120g BTIPS
I got a chance to go shooting and test my friends rifle out. It is a Winchester shadow in 7 WSM. He wanted a yote bullet and I had a box of 120g BTips laying around. I got him some IMR-4350 and CCI BR-2's. Since there is hardly any data for the 7 wsm, I took it upon myself to do some homework. I looked at the 270 WSM data for 130g's and just compared a lot of the weight of grains they were using. I figured I would start at 60g for a starting point and worked up to 63g for max load. I loaded up 3 rounds each with each powder charge. 62g proved to be the most accurate giving 1" group at 100 yards, while scooting along at a mild 3200fps. I think I can go up in velocity, but 63g opened up to 1.25". His rifle is totally stock, no trigger job, which by the way freaking sucks, I hate 10lb triggers. I figured 1" 3 shot group at 100 yards for factory rifle will be good enough to bang a yote from around 500 yards away. I then went back home and loaded up the rest with 62g IMR-4350. I put a 300 yard zero on it and was surprised to see my 3 shot group at 300 yards was still shooting MOA or 3 inches. He was very happy with it. He is using a bushnell elite 3200 scope. With that load and a 300 yard zero, if you put the bottom thick part of the duplex on a 8" rock at 475 yards, you will be hitting any coyote, as I was smacking that rock.