i started out with 160gr.grand slams in my 7mm mag. worked great on elk, not so great on deer never lost any deer the would run off leaving an awsome blood trail. the last one i shot went a quarter of a mile. i switched to 140 gr nosler solid base bullets and have shot a bunch of deer no problems my son uses the 140 gr ballistic tip in his 7mm mag and has shot a lot of deer and loves the bullet
Ed