So I have an H&R heavy barrel .223 single shot rifle that is just a dismal rifle. It was the most inaccurate rifle I owned until I stretched the COL way out to get kinda close to the lands and now it is just not accurate instead of horrible. I was wondering if it is possible to ream this barrel to something else? Maybe a 224 Valkerie? I'm open minded to any caliber cuz I wouldn't mind buying some new dies and working up some new loads and its a single shot so brass availability isn't a huge concern.