For the most part I know what I am doing, I just wanted other people's opinions beforehand. The gun is used, I haven't been able to figure out how to get the TKO off (yes, I took the screws out, but it's just kinda stuck) so I can't really clean it, and no, I haven't been able to try any more pellets than that because Walmart doesn't stock em and since Amazon and eBay don't really have any acceptable prices for pellets. I'm not sure I can convice my dad to order from Pyramyd. I'm just having to work with what I've got locally, for the most part. I have looked through the forum for accuracy reports, but it's been a month or so and from what I remember there wasn't much to be had for 25 yards.It has a 2 screw trigger mod, power adjuster, 6.5" TKO, two coils cut from the hammer (believe that's the right term) spring, and a second barrel band. Core group was from about 1850psi to 1150psi. Yes, I have a chrony, and have been using it for every group I've shot with it so far. I am guessing the guy that had it before me tuned it, but I'm not sure what pellets he used. Also, I just shot another group with it just now and got a .9" group with about 20 shots (the ones that were within 4%). I'm shooting the pellets from 760 to 790fps.
Mid to high 700 FPS may be to slow for the pellet, mine shoots JSB's at 850 to 940 the best (15.9 grain). You will have to go through the tuning stage yourself until you find what you want in groups and FPE. The Crosmans shoot ok in my 2 Discos but not as good as JSB.Good luck and happy shooting, it will come around just a little fiddling around and it will drive tacks at 35 yards.William
I shot a string starting at 2000psi over the chrono and shots 18-42 were all between 765 and 790fps, so why should I only be shooting 12-15 shots? That's well within 4%I may possibly be able to get a 250 pack of each JSB from eBay or Amazon to try. I'll see if I can make it happen...
Thanks, PM sent. I'll work on it some more tonight to see if I can get the groups to tighten up a little bit better.
Also, does anyone know if a long probe or flow through bolt is worth getting? I was debating whether to try one and see if it makes any difference since they are just $12 from Mellon Air.
Ok, just shot another group and accuracy wasn't any better. Here is something that might be a clue though. I'm not quite sure what to make of that vertical string. All shots in that group were from 765-785fps. The POI shouldn't have shifted that much just from a 20fps difference, right? Ideas anyone? Is this just a coincidence?