OK...working on a build that I've wanted to do for awhile. I'm going with a quality chassis, a trued up Remington 700 Stainless long action, Criterion Varmint barrel...24-26", Shilen trigger. Chambering will be .280 Ackly Improved. I'm likely going to be hurling 165-175ish pills and I'm looking for opinions and reasons for the barrel twist rate. I want to be versatile for different grain weights in case I want to go a little lighter or a little heavier on the actual bullets. I'm thinking 1-8.5 should give me some options. Any thoughts??