308 with 20” 1:9 twist barrel

[Glocklover72]

I recently acquired a 308 rifle with a 20” 1:9 twist barrel. I know not very common so what’s your thoughts on bullet stabilization on various grain bullets

 

[Dos XX]

200 grain and up, easily. I bet it would work on 175 and 185's too.

 

[JP100]

I would try some normal 150-165s first and see what happens. Chances are they are probably fine