The normal wear in a 300 RUM will last the life of the owner.I've had 3 and still own one.I love the 300 RUM and a big fan of the .338 RUM.

I wouldn't switch from what your using,I have owned the 300wsm and it is great little round as is the 270 wsm.If you are realy worried about weight,not being a a$$ go on a diet and start working out,drop 10lbs and then gain 10 lbs of muscle and the 300 RUM will seem like a 6lb gun on opening day.
BBJ