Here's a pic of a 50 yard shot group using Montana Bullet Works 300 gr WFNGC bullet out of a stock Ruger Bisley Hunter and 2X burris scope....



This was a .430 dia bullet and seemed to shoot well. You may have to experiment with diameter. I called MBW and got their suggestion on bullet diameter for this was the first time ever shooting cast - I didn't venture any further.

It takes 43 muscles to frown and 17 to smile, but only 3 for proper trigger squeeze.