1:8 is the absolute fastest twist for a 390gr A-Tip unfortunately. They are extremely easy to load vs any solid I've used in the past in my experience. A huge benefit is the ability to see splash on the plate and make corrections as needed at distances where a solid hit is not visible. We spend 5 minutes and do weight sort them by tenth a grain however. It's typically a .8 grain spread. I don't know if this has any actual affect down range but it makes me feel good haha. Something tells me the lightest bullet in the batch next to the heaviest would fly differently. We've finished 1st,2nd, 1st, 1st, and 2nd between Jaclyn and I this season using them so they definitely work well.