I am thinking about building a 6.5-300 SAUM on a S/A 700 remington action I have. It has a Wyatt extended mag. box that will seat to 2.98 COL. It would be tight with a 6.5-284 loaded with 140gr. bullets so I was thinking about a SAUM case to build a 6.5 s/a rifle on. Anybody tried this? Any function or pressure sensitivity issues? 24" , 25" ,26" barrel ? Thinking 25" with six flutes on remington mag. sporter contour barrel. I will be taking apart a 7mm-08 cdfl that I'm bored with. It has over 2500 rounds through it so it's due for a new tube. I will need a new bolt I know already but can anyone point out anymore issues.