ranger140892

If you can't get the info on twist rate from the factory, do this:
Put a tight fitting patch on your cleaning rod. Preferably a rod with ball bearing handle so it will follow the lands and grooves freely. Start the rod into the rifling. Make a mark on the rod about a foot before entering the receiver if pushing from the breech. Measure the distance the rod moves until the mark on the rod rotates 360 degrees. If it makes one complete rotation after the rod moves 10 inches, your twist is 1/10.