Pete B.
It would be fairly inexpensive (I know that is a relative term) to experiment with take off Rem. 40X factory barrels (1-14 twist) that are chambered and fit for your Schuetzen Rifles. At least one current barrel maker ( I think Lilja has a three groove) has a 1-15 twist barrel available that will fit inbetween the 1-16's and the 1-14's. Keep us posted.
John M. Carper