I had DMR build me a 18 inch 6.5Creedmoor and put a Crux Titanium can on it. I was able to get 2860FPS with RL26 and a 215primer with a 143 but could of pushed it harder. Without the CAN though.....it was unbearable to shoot!!lol Loud as heck.
I'm getting ready for some Sherman in a short barreled rifle configuration. Load data I'm seeing is trading off about 10fps per inch of barrel- I can live with this.
Years ago Remington made their 760 pump in a carbine model with an 18" barrel chambered in 30-06 and 270. Sweet timber gun, I have a couple friends who have one but have never convinced one of them to sell me one.I would try Sierra 168g in a 30-06 PPU (tough heavy) case with Magnum primers and work up to see if a case full of 4064, Varget or H4831 [work to burn all the power in the 18" barrel] would get near 2900fps.
You'll get close and You will love the HammersYou think I could get 2900 with a 160 class and a 7 saum with an 18" barrel? I'd love that. I've been hearing things about the hammers that got my attention for sure.
I've played with the saum and love it, but I'm getting 2950 ish with a 162eldx and a 24" barrel with H4831sc.
I don't see how to get to 2900 with an 18