I had a 7-08 mountain rifle I slapped into a TI takeoff a couple years ago. The damn thing would put 5 rounds into less than 3/4" regularly. I sold it like an idiot and have regretted it ever since.
My advice is to buy one. Try it. If it doesn't do what it should pretty darn quick, get rid of it & try the next one. If I'd taken my own advice on that at times over the years I would've been better off!
