Lost Sheep
Member
I took my Ruger 480 to the range last weekend and got these velocities. The Chronograph was a Chrony Beta Master, 12 feet from the firing station, using skyscreens on a sunny day. Temperature was around 60 degrees.
All figures are in feet per second and were Hornady factory loads, 325 grain bullets.
1707
341.6
1707
360.4
328.4
1688
1701
1686
I also ran other rounds over the instrument, including a batch of 5 Hornady factory loads in 454 Casull and 25 other other rounds (handloads). None of the other rounds gave those oddball low velocities (the three in the 300 fps range) that contaminated my first batch of rounds.
Does anyone have a suggestion as to what would cause a Chrony Beta chronograph to give a random smattering of ultra-low readings like that?
I am pretty sure it couldn't be a low battery because it the odd readings were the first rounds of the day and the instrument worked well for the rest of the day. Nor do I think it could be the contacts because I made no changes or adjustments all day.
Thanks for reading.
Lost Sheep
All figures are in feet per second and were Hornady factory loads, 325 grain bullets.
1707
341.6
1707
360.4
328.4
1688
1701
1686
I also ran other rounds over the instrument, including a batch of 5 Hornady factory loads in 454 Casull and 25 other other rounds (handloads). None of the other rounds gave those oddball low velocities (the three in the 300 fps range) that contaminated my first batch of rounds.
Does anyone have a suggestion as to what would cause a Chrony Beta chronograph to give a random smattering of ultra-low readings like that?
I am pretty sure it couldn't be a low battery because it the odd readings were the first rounds of the day and the instrument worked well for the rest of the day. Nor do I think it could be the contacts because I made no changes or adjustments all day.
Thanks for reading.
Lost Sheep
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