I need some help. I am very interested in shooting the 168 LR AB bullet out of my 7mm RUM, but I have some questions before I start loading them. Would a 1:9 twist be O.K. for this bullet? Velocities will likely run in the 3200 ft./sec. range. Barrel is stainless 27 3/4 in. on a Ruger No.1 What seating depth should I use, magazine length not being an issue? I am currently using the 160 AB & seating .010 off touch. Any help or suggestions are much appreciated. :grin: