Free: Contests & Raffles.
If I were a betting man, I would bet that rotational energy has next to no impact on energy delivered or bullet expansion. When bullets open, I don't recall ever seeing any evidence they were spinning, there is no bending of the petals as you would expect if they kept spinning. The force on the petals I have seen is always perfectly linear back the direction they came from. The coppers I hunt with won't open below 1500 reliably, I do agree you have valid concerns there. I didn't read every reply, did you consider some version of a bullpup? Seems it might be easier to deal with the barrel being too short than finding a bullet that will work.
Have you considered a single action rifle? A single action with a 16" barrel would probably be about the same length as a bolt action with a 12" barrel! Custom Barrel: https://www.bullberrylegacy.com/oldcustom-encore-barrels
Super late to the party but this is what I built years agoVirgin 700 receiver. 13” 308 win 1/7 twist from x caliber Black collar arms chassis Sb1913 brace Throw on bipod Shooting 165gr CEB lazer (all copper)Varget 2450fps. Still has 1000ftlbs at 600 yds. Going 1650fps. I personally wouldn’t shoot game at that distance unless conditions were PERFECT. But then I’d probably just try to get closer. I even made an MOA subsonic using 194gr expanders by Lehigh defense. Super fun to shoot And hopefully you get to build one too just make sure to have Dana (dredi) cerakote it for you. Best of luck Btw this is technically a pistol
Great stuff guys, thank you.Mocking up some stuff right now and trying to figure out where the best tradeoff of all the variables. Trying to take a lot of the comments here to heart and revaluate and make sure I end up with an optimized solution.