For 160s a 1:9 or even 1:9.5" will work OK. I would go 1:8" though as there's essentially no downside to faster twists until you get down sub-1:7" or extremely high RPMs on varmint bullets. For big game twist is your friend. Go with 1:8" and you'll be future proofed for any bullet you might want to run and for reduced loads if you ever go there.
I thin the 175 Weldcore is the best general purpose plains/thin skin game bullet for the .280 AI.
Last edited by Llama_Bob; 09/13/19.
