A 1-48 twist is a kind of an inbetween twist so it will shoot RB, the big lead bullets and some do a fair job with sabot and short bullet.
You did not say what cal. and that can make a differance. Witha 54 its hard to beat RB with a 50 I would be inclined to a sabot with a 44 cal. 180 gr or a 45 cal. 200gr [they are what shoots in my 1-48] with a 45 I would go for a maxie or a maxie hunter; for hunting for target its hard to beat RB.
Lee