Cayugad
I have had several guns with a 1-38 twist that shot PRB quite well the System One I have now will tear a single hole with 90 gr P and a PRB at 50 yds with iron sights and give respectable 2 to 2.5 inch groups at 100with a scope [my eyes are not what they used to be]. I have seen an inline that was rebarreled in a 1-48 twist with a 54 cal. barrel that also shot PRB well. Lee