Alright guys, putting together my first "real" build and need some advise. I've always wanted a thumbhole stock but I live in the Deep South and not many folks around here know what a manners or mcm stock is. I am using my 7mag sendero action for this build and want to semi true the action and replace the barrel. I have a fluted sendero obermeyer 1/10 30 cal barrel on the way. However I can't decide between the manners t5 or the mcm lazzeroni. This gun will be used mainly for hunting but also for target shooting g as well. My action is a long action with factory hp, but can i do a 300 wsm or would I be restricted to 300 wm?