I've got one, bout 4-5 years old. Yes they are 1:12 Likes the 55gr pretty well, going to load some 50gr Hornadys I have, I'm betting possibly even better.
New stock, pillar bedding soon as material is here and has a new Leopold Mark Ar mod 1 3-9 x 40. I'm anxious to see what it will do soon as I am finished.