Take a look at your manual for their recommends. Probably 1:48 twist which is neither ideal for PRB or Sabots but instead a happy medium for both and capable of shooting both with good accuracy. Range time is in order to work up the loads you are comfortable with. My target load is 70grns, my teaching load is 40 or 50 depending on whose powder I'm shooting and my hunting load is 90-95. All with loose powder. The last time I went out, I shot a 1.5" group at 40yds. I'm happy !!!
Everyone has told me that the barrel wont be good for sabots. Is this true???
Not so, just not ideal. Look your barrel over and see if the twist is identified.
Be Safe !!!