I never had a 6.5x55, but did use a .260 rem until I had it reamed to 6.5/284. I used Noslers only, but I have killed game with a couple 6mms and x bullets and a 257 Weatherby. I think your 130 TSX will make your 6.5x55 kill like a 6.5/06 with regular bullets, maybe better! I'm assuming from your avatar we are talking about heavy game, or at least blesbuck and up? Should be "pure poison"! Would love to hear how your load workup goes. Good luck.