Cold Bore at 2K

[CoryT]

New barrel and can on the Ashbury .375 CT means a recalibration of the computer. Final test on the 2K range this AM looks like we are pretty much on the cam. Can't tell you all how much simpler the use of the Labradar, Shotmarker targets and the Wind Zero meters makes the whole process, next best thing to having a Doppler unit. 6 rounds to zero at 100, getting MV off the Labradar. 1 shot at 500 to test initial come up value and get downrange velocity check. 3 rounds at 1000, making a slight BC edit as we are .2 high (grid is .2 mil). Then, two 3 shot groups at 1500, still a bit high for the first 3, small change puts group on the waterline. This AM was a final test, cold bore 5 round group at 2000.

 

[TheDude219]

New barrel and can on the Ashbury .375 CT means a recalibration of the computer. Final test on the 2K range this AM looks like we are pretty much on the cam. Can't tell you all how much simpler the use of the Labradar, Shotmarker targets and the Wind Zero meters makes the whole process, next best thing to having a Doppler unit. 6 rounds to zero at 100, getting MV off the Labradar. 1 shot at 500 to test initial come up value and get downrange velocity check. 3 rounds at 1000, making a slight BC edit as we are .2 high (grid is .2 mil). Then, two 3 shot groups at 1500, still a bit high for the first 3, small change puts group on the waterline. This AM was a final test, cold bore 5 round group at 2000.

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That's awesome. What software/hardware do you use to get that level of detail/analysis?

 

[isofahunter]

That's awesome. What software/hardware do you use to get that level of detail/analysis?

Read sentence 3 in CoryT post.

 

[CoryT]

The ballistic software is Field Firing Solutions. The Labradar provides muzzle velocity using a Piet recoil trigger. The Shot Marker targets from Adam McDonald provide precision shot grouping and downrange velocity information. When coupled with actual wind data from the Wind Zero meters, a very precise BC and DK value can be computed easily. Using Vector 21 BLRF backed up with GPS gets the calibration target ranges +/- 2 yards. First shot at 2K was about 15" left of center, so I nudged it into the wind (R-L at < 2 mph) to the edge of the plastic used as the aiming point on the ShotMarker (24" wide) and shot the rest of the group.

 

[TheDude219]

Lot of great info there. Need to spend some time reading about all of those components. Really appreciate the detailed reply

 

[CoryT]

This is the result of years of working on the XLR class here at Gunsite. We use all this to get clients systems calibrated as quickly and as accurately as possible. Come a long war from Ohler's with skyscreens and sheets of wallboard with targets on them where Walt or I would wait behind a berm for a group, then come out and measure it, radio back, then enter the data into a computer for an estimate, lather, rinse, repeat. This is precise, simple and fast.