For further comparison:Bullet RPM = MV X 720/Twist Rate (in inches)
For a subsonic - 1050 x 720/3 = 252,000 rpm (300gn Matchking)
For a supersonic - 1970 x 720/3 = 472,800 rpm (210gn Barnes TSX)
For comparison -
308 supersonic - 2800 x 720/12 = 168,000 rpm
(300BLK) MUZZLE VELOCITY | TWIST RATE | BULLET RPM |
1070 | 8 | 96,300 |
1070 | 7 | 110,057 |
2077 | 8 | 186,930 |
2077 | 7 | 213,634 |
2077 fps is S&B 147gr
That 1:3 twist is amazing...