X-caliber 24" 223AI 10 twist 6 groove, less than 400 rds. Is a varmint contour, target crown, MVP Varmint stock barrel channel will need to be enlarged. No nut or recoil lug. Shoots 53 vmax quite well. Shoots 40BK well (only 2 bullets used). Load data available. Might be willing to part with a small amount (50 or less) of fireformed brass for add'l $$. HIGHLY recommend headspace be set with proper 223AI go gauge. Regular 223 go gauge is the 223AI no-go. Switching my MVP to 20 Prac going 223AI on a heavier Savage. $175.00 shipped CONUS, no paypal. Check, cash or PMO is fine. Trades considered- New blue box 6BR brass, new 223 brass (LC, IMI, Lapua). Edit- wrong twist its 10 not 9. Dorp.