I am going to copy this and ask Chris (Bayside Custom Gunworks), and then I will post his response.
Thinking a 14T or 16T, but I am not for sure. I let Chris choose the barrel (Green Mountain) and the twist rate.
Originally Posted by Oregon45
Very cool! The 170 Sierra is an excellent bullet. What twist is your barrel? Will it stabilize a 180gr .35 caliber rifle bullet?

Ernie "The Un-Tactical"

[Linked Image]
http://sebrests-usa.com/