Edgun fps changing from day to day – hour to hour???
My Edgun came shooting @ 920fps (as recorded by my lighted chrony in the basement). A few days later, at the range, I felt like it was shooting more slowly. I didn’t have my chrony with me, but noticed that I had to hold over by an extra dot at 100 yards. When I got home, I tested the gun on my back porch in the shade – the chrony said 880 average. So, I upped the gun back to 910 average.
Today, I went to the range again, and the chrony said the gun was shooting at 950 average. I believed it because they pellets were laying down 1″ groups at 50 yards, and I know it can do better. When the gun got to 110 bar, and the chrony reported 910fps, the groups went back to MOA. I even went out to 100 yards, and shot two groups – one at 150bar (950fps) and one at 110bar (910fps). The one at 950 was just over 2″ – the one at 910 was my first sub MOA group with this gun.
When I got back home, I went to the backyard to dial the gun back down. I filled it to 180 bar and took a shot…912fps. Took another – 906fps….907…902…905…906….
What could be causing this? Batteries are fine in the chrony. I really think it is the gun. After you shoot it 500 times and make power adjustments, you get a feel for knowing the sound for each speed – or, at least I thought I had a feel.
The accuracy and chrony reading sure had a strong correlation. So, what could be causing this significant change in speed (40fps)?
All Replies
- You must be logged in to reply to this topic.



Everyone else is being answered on the daily basis 😀 😀 😀