I had a 7-30 waters 14" super, shot 5/8" at 100 years, flash and recoil was not bad.... INCREDABLE at night!!! but I made the mistake of pulling the trigger on a deer with one ear plug plartly out... No long lasting dammage, but i'll never do that again.
The big reason I ask about accuracy being affected is that I read in a few places that a 25-06 (different caliber, I know) needs a 24-25" brl to get the bullet stabilized to make it shoot worth a hill of beans.