I am going to convert my 223 10FP to 260 Rem that will be a prone gun that I will shoot paper to 1k (140 ish grain bullets) with optics. What would you guys suggest on barrel length? I have no experience with this round unlike the 308/223. I shoot Palma and we like barrels at least 30 inches. But, with this I have no idea...26 or 28? Mike