I shoot a 6.5x55 and have had very good luck with the 120 grn TSX. This over a book max. load of RL-19 for just under 3000fps.
Put a 250# mule deer on the ground after 3 steps. Lots of internal damage. Have yet to try the 125 grn Nosler Partition. Really a lot of fun at the range to shoot this T3 Tikka. Very accurate and light recoil makes this a joy to shoot. My son's neighbor is from South Africa and he says they are very popular in hunting antelope up to and including 500lbs. Underated killing power here in the States. Buckfever1