You'll just have to try differen't ammunition until you find out what your rifle likes. My .25-06 has shot both the 100 grain Remington and 120 grain Federal Fusion well well enough I'd hunt with either. I reload for it now so I haven't bought ammunition for a quite a few years for the .25-06.
I like to glass bed all of my rifles even if it has the aluminim bedding block. Glass bedding takes out all the imperfections in the bedding if done properly. I'm not 100% sold on the bedding blocks without glass bedding. I feel that the bedding blocks make for a more rigid stock vs. the cheap synthetics out there. They do improve accuracy vs. the tupperwares but I don't think it is a superior system to pillars and glass bedding in wood and laid up fiberglass stocks.