MD, wouldn't argue that the .17 doesn't have better drift numbers but running BCs and published velocities through a calculator that advantage was not something I perceived as significant. The calculated difference is small for the two examples below 100/200 yards. Velocity has an effect to be sure and published BCs are either real, false, estimates or averages. I think Sierra's stuff to be credible and velocities may vary.
Numbers I used for the comparison:
.17 HMR, 17 gr Hornady - BC .125 MV 2550 3.77/15.72" Drift
.22 WMR 40 gr JHP (Sierra) - BC .145 MV 1900 4.65/18.55" Drift
.22 WMR 40 gr JHP (RFC) - BC .110 MV 1900 6.21/24.76" Drift
Last edited by DigitalDan; 12/15/10.
