It was pellet on pellet @ 50yds., now it shoots 1 1/4" 10rd. groups with maybe 3-4 pellet on pellet. HELP!
What happened to my Crown?
- Thread starter Mgaoiran
- Start date
Gradual degradation usually means a cleaning is in order.
If all the sudden, check for clipping in the baffle/shroud (or shoot without it to see if the scattering stops), loose screws (scope mount and barrel in particular), and run it over a chronograph to see if the velocity is varying wildly or if your state of tune has migrated up or down.
If all the sudden, check for clipping in the baffle/shroud (or shoot without it to see if the scattering stops), loose screws (scope mount and barrel in particular), and run it over a chronograph to see if the velocity is varying wildly or if your state of tune has migrated up or down.
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Blejda,
No, middle of JSB 18.1gr. tin. I cleaned the barrel, no change. Thank you for your response.
Regards,
Mel
No, middle of JSB 18.1gr. tin. I cleaned the barrel, no change. Thank you for your response.
Regards,
Mel
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My other advice would be to remove the hammer and inspect the bore in the receiver. Mine had some debris buildup from the trigger group I think, and was affecting my accuracy
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I use a barrel tensioner from Ernest Rowe instead of a shroud. All checks out except for the chrono. I had time to shoot 5 rounds on the Fx Chrono after a 10 shot warm up. Kestrel reports less than 1 mph from behind. 1" group @ 830 fps, 4 fps extreme spread. Usually shoots at 845 fps.
Thanks,
Mel
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No. But doesn't hurt to check it/replace it. Maybe it is still damaged and causing an issue? Typically it's the variation in velocity that causes inaccuracy. That or a damaged barrel. Poorly or overly tensioned liner. Or something else loose somewhere. I can't imagine your scope would be busted, but also possible.
Something else that failed on mine was the valve stem guide.... It's just a little piece of plastic on the end cap where the valve spring is
Something else that failed on mine was the valve stem guide.... It's just a little piece of plastic on the end cap where the valve spring is
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I would at least check the inner barrel o-ring. Isn't there only 2 or 3 screws to slide the barrel straight out?
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While the barrel is off check the sliding shroud unscrew and see if the shroud centering spacer is ok and check the pellet pusher (probe) if it wobbles (not tight).
Removing barrel to check breech o-ring will at least have you tighten the barrel retaining screws after reinstalling.
Removing barrel to check breech o-ring will at least have you tighten the barrel retaining screws after reinstalling.
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