264 win mag rate of twist question?

[brad1985]

I have an older ruger m77 with the top tang safety chambered in 264 win mag. I purchased the gun new in the late 1980's or early nineties and I am curious to know if anyone could tell me what the rate of twist for this gun is.It has a 24inch barrell and shoots factory remington 140gr. core loks under an inch @ 100 yds (3 shot groups).
Another question does anyone have any suggestions for reloading data on this particular rifle & cartridge?

 

[cliffy]

Most likely it's a 1-in-9" twist. This is an extremely accurate long-range rifle. Happily, Ruger has revived this super 6.5mm caliber offering. It may even revive my desire to shoot 500 yards at deer and antelope. If not, its prowess would be wasted at 200 yards. Cliffy