Ruger 77 Barrel twist ?

[Kevan]

Would anyone happen to know what the barrel twist would be in a 1976 vintage mod. 77 tang safety in 257 Roberts ?
Any info will be greatly appreciated..

 

[mswill]

Here's one method to determine twist for yourself if you are so inclined:

http://www.youtube.com/watch?v=cdoCNZBlRGQ

 

[Chief 101]

I believe the one I had about the same vintage was 1/10"

 

[R1895]

Yup, looks like 1-10".
http://www.deltagunshop.com/clearwater_reboring/factory_twist_rates.html