IMO, once you get in the lighter recoiling guns, you always seem to lose more rams. I could be wrong, but it seems that way. That being said, I have shot with guys using 7 BR, 6.5 BR, 7 TCU, and even 243's. I have seen tham all lose rams on center hits. One side of the ram, one foot kicks off, down it goes. Center mass hit, ram just wobbles. I have also personally witnessed a fellow shooter using 308's loaded with 220 gr, and lost a ram on center mass hit. My dad got his grand slam pin shooting a 7-08 for the most part, but is currently using a 7mm IMSHA. Little less recoil, but still reliably takes down rams. Billy