I don't wish to appear as being argumentative, OJ, but...
I had a T/C renegade in 50 and danged if that thing didn't have the 1:48 twist and of course, I had much, MUCH better eyesight then, but I could touch 3 RBs at 65 yards with it with various loads! and Oc Yoke precut RB patches and Bore Butter. I lived in PA back then and we were restricted to PRBs, so I never shot anything else...in later years there they went to 'any" projectile and we shot CVA Powerbelts with similar accuracy...Those nasty things were devastating...
Now the GPR I have also in 50, is 1:60 and I've only shot PRBs but did try some REALs. The 350's didn't shoot well but some gifted 250's (shot much better) in that ole FWIW dept!