I gave it a try in my son's 270's on Sat. Although I've only tried it at 50 yds so far, the results are favourable. 5 shot groups right around a one inch group out of a Ruger M77 Sporter. Looking forward to see how they shoot at 100 yds. The young fella had no problem shooting them either.

On a side note. The integeral scope bases that come with the M77's are dang near on zero right out of the box. I didn't bore site the scope when I put it on. After 4 shots we were on zero.