Tuesday I got a Taipan Veteran Compact in .25 cal. So I wanted to see what the gun could do, and of course to do that, I had to use a chronograph and in this case it was the FX Pocket Chrony. I tried the “minimal setting” of the hammer spring and on the airgun high power setting and the Chrony wouldn’t detect the pellet, so I went with the Airgun UK setting, then it came up.
Today, I wanted to see what the max power of the Taipan would be with JSB Hades 26ish grain, but left the Chrony on the UK setting. So I did a shot string slowly cranking up the hammer spring tension between shots. I started in the 700s then I got to 800 then nothing. So I jumped to the airgun high power setting and 875 FPS / 45 ft/lbs came up. So I was happy because I got the published energy rating.
Now the BUT....the “old” numbers in the shot string #s increased an average of 75 FPS from the originally measured speed when I went from airgun UK setting to airgun high power setting.
Why is the FPS changing in the shot string when I change the profile of the rifle? Measure speeds should be measured speeds.
Today, I wanted to see what the max power of the Taipan would be with JSB Hades 26ish grain, but left the Chrony on the UK setting. So I did a shot string slowly cranking up the hammer spring tension between shots. I started in the 700s then I got to 800 then nothing. So I jumped to the airgun high power setting and 875 FPS / 45 ft/lbs came up. So I was happy because I got the published energy rating.
Now the BUT....the “old” numbers in the shot string #s increased an average of 75 FPS from the originally measured speed when I went from airgun UK setting to airgun high power setting.
Why is the FPS changing in the shot string when I change the profile of the rifle? Measure speeds should be measured speeds.
