I have a model 111 in 7mm I am looking at getting an aftermarket barrel (undecided at the moment on which one). I want to shoot u to 180gn so i was thinking about 1:8 twist or 1:8.5 in a bull barrel. I was reading a few barrel manufacturers have 5 and 6 groove barrels,that's new to me. What is the main difference between them? What are some good barrels out there in and around the 400$ range that you guys actually use? What is a good replacement stock as well that's not going to cost an arm,leg and first born child? thanks