Got this update: It has a McGowan 24 inch barrel with a 10 twist. I chambered it in 257 Roberts Ackley Improved with a tight no turn neck. I did it this way so even someone who doesn't reload can still use store bought factory loaded 257 Roberts ammo. When you fire standard 257 Roberts ammo in the gun, it blows the brass out to 257 Ackley Improved. I also have dies I'll let go with it. You can use them to reload the fire formed brass back as the 257 Ackley round. The stock is unbelievable. Even the barrel channel is fitted to the barrel contour with no gap anywhere the entire length.

Picture of the Channel:


bottom:


broad view


Forend closeup


Butt