Re: 7mm Rem Mag Twist Rate
If your planning to stick with 140 to 160 grain bullets, a 1:9 twist will do it. That will even handle up to a 175 and even 180 grain bullets. It will be all you need.
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.  But small is the gate and narrow the road that leads to life, and only a few find it.
If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger
Friends don't let friends develop canonitis!
arguing over the internet is like the special Olympics....even if you win, you are still...special!