I'd definitely go with a Stiller. Caliber wise, after shooting/owning the 338LM Ackley Improved, I'd probably want to do something crazy like AI that too. A couple of weeks ago, my buddy and I were out with my gun and his DSR-1 shooting at 1230yds. That was an accurate measurement by the way. I can't recall exactly what the MOA difference was but the impacts on the steel plates we'd set up were significant enough for him to want to AI his Walther bbl. We were using the same Lapua brass, 300gr SMK bullets, same powder and primers and since I'd done the load developement on his gun, he was maxed out at 101.5grs while I'd just redone my load developement and I was still at 111.5grs. I was still punching through the 3/8" steel while his dented the plate. I can back off roughly another 365yds and then I'll be maxed out for distance at that particular spot. I've got a 40MOA rail and 100MOA of elevation in my 5.5-22 Nightforce. Out to 1230yds, I'm sitting at only 31MOA over 100yd zero which is amazing. Going with the Cheytac isn't necessarily going to mean flatter trajectory though once dialed into the target, penetration should be better. I still think the 338LM AI is still the hybrid to beat as far as rounds/$$ and packability of the rifle itself.
