I shoot the 80gr Hornady A-Max bullets in my .220 Swift at 3305 FPS through a 1 : 8" twist barrel , and that twist rate and velocity achieves 297,450 RPM spin rate . The barrel is 6 groove , button-rifled , 26" length .
I have never had a bullet not make it to my target , and I have shot this rifle in 1000 yard F-Open matches .
I have shot approximately 1200 - 1300 rounds through this barrel , and it stills maintains accuracy .
I have not shot any 80gr ELD-M bullets through this rifle yet , as I still have several boxes of A-Max's .
DMP25-06