Chronograph Distance from muzzle
- Thread starter kk4iz
- Start date
Oehler 35P We have it set up for center fire at 15 ft. We called Oehler and they said to set it same as center fire for air rifle. I'm not getting the velocity that everyone else is claiming they are getting out of their gun, about 875 fps with 25 grn JSB with my Wildcat.
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I use CE ProChrono Digital and set it up 1ft away from the muzzle. Base on that set up, my Wildcat .25 shoots 890fps with JSB King 25.4gr
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Sounds to me between teeken shooting at 890 fps at a 1ft and kk4iz shooting 875 at 15ft, with a diabolo pellet dropping fps fast it is fairly equivalent. Of course every gun is set up slightly different. 15 feet is a long way off. No wonder so many guys shoot their chrono. Do you get a lot of errors trying to line everything up?
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No we don't. With 3 shy screens there is very few. When we get some sun shine here in Alabama we'll give it a try again at a closer range.
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I set my Pro Chrono 3 feet away from muzzle when I shoot my rifles and 5 feet when I shoot my crossbows and vertical bows.
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I'm only maybe 2' back when I use my Pro Chrono. If I was any further back I'd end up shooting it! JMO
Ed
Ed
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If you are measuring muzzle velocity,shouldn't the muzzle be as close to the chrono as it can be.
Like Dirte said, velocity drops off quickly.Not because I wanted a chrono that was close to the muzzle,but it was priced right and ease and convenience,I bought a Combro that mounts to the barrel.About an inch in front of the muzzle.
Like Dirte said, velocity drops off quickly.Not because I wanted a chrono that was close to the muzzle,but it was priced right and ease and convenience,I bought a Combro that mounts to the barrel.About an inch in front of the muzzle.
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Agree with Dirte. I purchased a muzzle mounted chrono from Ed Gun West for $125.00 plus shipping. It works quite well. Although you may need to make an adapter for it to mount on your specific rifle.
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My Oehler has a large screen. As said before Oehler said to set at 15 ft with 3 screens because of muzzle blast but not much from an air rifle. You should how it shakes the screens with some of my center fire big bores even at 15 ft. You can get an error from the blast. I thank the Chronograph computes the distance you set for. First day that we get some sun shine we will try at 2 or 3 ft.
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