Str8shooter
WKR
- Joined
- Jan 16, 2014
- Messages
- 465
Got the chrono out and after measuring 10 shots (Howa 1500 in 300 win shooting 150 gr TTSX), (cooled after every 3) I had an extreme spread of 131fps and a standard deviation of 37.... this seems super high compared to the last out the box ammo I measured ( the now discontinued hornady GMX superperformance had an ES of 18fps)... Anyone else measure their ES for this ammo/manufacturer? Is this a problem for extending the range to 500-600yds? Any comments on what an acceptable ES should look like? Thanks