yes all lyman rifles are made by Investarms and the 1 in 32 twist should print some nice groups with a conical or sabot bullet.The guy also had a 1in 60 twist barrel for the same gun in 54cal,but I do like to shoot a conical over a round ball.
Funny how thing work out my first choice on a side lock was a lyman trade rifle 1 in 48 twist and about 1 lbs lighter then the GPR ,but I was not crazy about the barrel twist that lyman offers in the trade rifle.
I would lean more to the trade rifle over the GPR if that rifle had the same twist as the hunter model.
I may get out and shoot the rifle next week weatherman says temp. will reach 50 degrees