I also have a .308 bolt gun - Remington 700 with a 20" barrel. My barrel has a 1:12" twist rate. So far, I've shot Nosler Ballistic Tip 150 gr., Nosler 155 gr. Custom Comp., and Nosler 175 gr. Custom Comp. bullets. They've all flown great. I'm getting sub-MOA groups out to 200 yards. For powders, so far I've used Varget, and really like it - but it's become rather scarce. So, I was able to get my hands on a good quantity of IMR 4064 and worked up some loads for it, and it's running great. I hope to be able to shoot it at longer distances, but for right now 200 yds. is all I have access to on a regular basis.