I built a 6.55X55 sporter in 1968.
I worked at a gunshop after school and the smith guided me through the conversion.
I can't count the deer and antelope that have been bagged with that little darling. I sold it twice and bought it back twice. It's a man sized rifle with mild recoil and will reach out and touch things.
Mine is the carbine version and it is handy. The short barrel makes it a natural for tree stands.
Ammo price is the downside, but it likes re-loads.