Avg. Velocity W/ShotMarker .284 Win.,180 Hyb.?
- Thread starter Killick
- Start date
Keith Glasscock
Gold $$ Contributor
An awful lot of factors come into play in those numbers.
Air density
Temperature (as part of air density and separately)
Muzzle velocity
Meplat diameter
Barrel twist rate (more accurately, Sg)
I'm sure I missed a few.
As an example, my impact velocity increases ~200 fps at Raton when compared to sea level.
Air density
Temperature (as part of air density and separately)
Muzzle velocity
Meplat diameter
Barrel twist rate (more accurately, Sg)
I'm sure I missed a few.
As an example, my impact velocity increases ~200 fps at Raton when compared to sea level.
Do you have any data? I’d be interested in the ES of your speeds at 1000?
XTR
F-TR obssessed shooting junkie
@adamjmac needs to weigh in here. I don't know how precise the velocity numbers from the ShotMarker are. I know when I talked to him about another brand of target before he released the ShotMarker he said that the sensor spacing wasn't conducive to precise results. He may have improved things with the ShotMarker design.
Ned Ludd
Silver $$ Contributor
If you just want some 1000 yd data, past E-target data from FCNCs at Lodi (2016/2017) is still available online. The only rub is that you need to know the competitor number to access the data...shouldn't be too hard to find the #s for a few F-Open shooters that you know were shooting .284/180s. Some might actually even chime in here and provide you with the appropriate competitor number.
https://www.silvermountaintargets.com/past-results.html
https://www.silvermountaintargets.com/past-results.html
24 shot practice string shot back in July with a lab radar and a shot marker at 1000, 84 degrees 13% humidity 29.3 baro
Muzzle 2862 FPS avg, SD 5.3 ES 21
1000 yards 1616 FPS avg, SD 9.6 ES 46
9.7 inch 24 shot group. These are not tipped or trimmed. I don't know accurate the shot marker is at capturing velocity.
Muzzle 2862 FPS avg, SD 5.3 ES 21
1000 yards 1616 FPS avg, SD 9.6 ES 46
9.7 inch 24 shot group. These are not tipped or trimmed. I don't know accurate the shot marker is at capturing velocity.
50.3 g H4350, 2795 fps
I must have a slow batch of powder or barrel..I’m getting 2740 from 50.3 H4350...
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