twist rate of Ruger m77 mk 2 target varmint in .243 win.

[squiggy]

I have a .243 winchester Ruger M77 MK 2 Target/Varmint that I acquired back around 1995. It has been a tack driver with 60 gr sierra varmint HP's and Hornady 65 gr V-Max. I would like to use it to knock over 500 M Rams at the silhouette range. I am thinking of trying to load some 105 gr A-Max. Does anyone know what the twist rate was in these? Will it stabilize a heavy bullet?
What do folks typically think of Ruger M77s for precision rifles?

 

[JJones75]

1-9 twist if memory serves.
I tuned one up for a guy in our club and it shot 95g Berger VLD's fantastic. His rife fouled pretty bad and was one of the few that I saw a big improvement with after shooting the Tubb's final finish fire lapping kit through.

 

[nashlaw]

Agree with Mr. Jones- 1/9.

Had one in 25-06 and it shot lights out. Besides that '06, had a pair of OLD tangers that did well.

 

[squiggy]

will the 1/9 stabilize the 105 gr Hornady A-Max?

 

[jcann]

Berger bullets has this on their site that may answer your question on stability

http://www.bergerbullets.com/litz/TwistRuleAltWP.php

 

[shoot4fun]

will the 1/9 stabilize the 105 gr Hornady A-Max?

Many 243 factory barrels are 1 in 10.
It is likely (9 or 10 twist) your gun will not stabilize the 105 unless you push it very hard.