I shot a few slugs with the gun set on the max power and velocities seemed to jump around, not a consistent move in one direction... up or down. I set it down to, what I'm calling, the 10 O'clock position and was getting darn near the same velocities as the max setting, with a slow steady rise in velocity until it would peak out and start to drop. I fill just under max because when I filled to the max, the first two or three shots would consistently be lower velocity anyway. Not so much when filling under max (3600). First shot is usually lower, but not enough to change POI. I have been refilling every 10-12 shots while testing, so I don't know what max number of shots is, but I'm guessing not more than two magazines.
Buddy if you're planning on shooting commercial slugs with that I'd go with AVS slugs @ .218 diameter, Shephen has them slugs he swages down to a science.If I was going to order slugs from him I'd get the cup point with dished base on them. If the molds ever become available for the slugs I shoot I highly recommendthat mold for high speed slug shooting.
Thanks for posting that string huntr.I happen to have some 25.4 jsb jumbos on hand and ran one through the chrony at the 10:00 position on the power dial and got 905 FPS.My gauge is showing 160 bar if i’m reading it right.... one notch past 150?Would that account for the lower FPS?Man I need my pump
Quote from: 35 shooter on May 25, 2022, 04:39:51 AMThanks for posting that string huntr.I happen to have some 25.4 jsb jumbos on hand and ran one through the chrony at the 10:00 position on the power dial and got 905 FPS.My gauge is showing 160 bar if i’m reading it right.... one notch past 150?Would that account for the lower FPS?Man I need my pump I've never shot mine down that low because the velocities start to drop off pretty steeply at around 180 if I remember correctly. Pretty sure that's why you velocity is low. Like I said I've been refilling after 10 -12 shots while testing slugs. May have gone to 15 a few times.I shot some pellets when I first got the gun, on the lowest setting, but I didn't record them and don't remember the velocities. Seems to me they were respectable speed for pellets, but I'd be lying if I even made a guess. You're going to get a lot better when you can fill the gun. But, you should have bought a compressor. You're going to get tired of pumping.
I was in the same boat got the challenger .22 as my first pcp, went for the cheapest gun/chrony/pump set up I could find. FWIW I caved and bought a compressor today. Hand pump is fine once your dialed in just to fill up and go hunting. Absolutely miserable when your sighting in a scope or trying to compare different slugs at full power. I had the same thing happen filling to 3600+. Starts low and peaks before going back down I guess thats just how unregulated guns are. 3500-2500psi seems like the sweet spot on mine. Power knob threw me off a bit it's not linear. If full power is 70fpe half power isn't 35 its more like 50 and change. I had the barrel shroud touching my air tube too I backed off on the bolt holding it to the stock and it opened up some clearance. I might 3d print a barrel band the floating barrel freaks me out.
Buddy I use the cup points for casting the NOE 218-25RF slugs. I got a few chipmunks with it yesterday, today I'm going to trygetting out there right at daybreak, a lot of times the red squirrels will be noisy early in the morning like that. One of thosechippers I shot through the eye at about 30 yards, it blew out the other side of it's skull completely.
Use a photo hosting site. I use IMGUR.COM
Imgur is what I use also, I have a desktop computer and use gimp to crop/size them.maybe the next time I'm out with my .457 I'll try it on a chipper