So I managed to break something, again. Half an hour after fixing my original problem (see my previous thread).
I decided to finally swap calibres/barrels, from my original .22 700 mm (28″), to .30 500 mm (20″). Replaced my hammer weight from my Huma-Air 13.2 gram to the 14.5 gram option from the same manufacturer. Also installed the higest-flow pellet probe, the Huma-Air pin probe.
So far, all good. Left the power I had last for the .22 - about 291 m/s (954 fps) at setting 7 with JSB Knockout .217, but dialed the power down to setting 5.
Loaded first slug (ZAN's, do not know the exact weight, but they are about the longest taht would work with a standard FX magazine). It took a lot more force than the .22, but I reassured myself that it was due to the much larger slug surface and resulting friction, as well as the minimal area the pin probe acts upon.
Fired (258 m/s, 846 fps), and again - same resistance when feeding the slug, slightly lower velocity.
So I switch to setting 7, cycle the action, and right at the end, when the slug is already out of the magazine but probably not quite clear of the transfer port, just before the cocking lever locks in the forward position, a loud POP right out from the action.
Otherwise, no indications of what went wrong - rear reg pressure held at preset value, when I took off the barrel expecting to see shredden remains of some seal or other, nothing. Everything seems fine, but I am too chicken to try again, because something is obviously not fine! Don't need the gun to go bye-bye, and even less do I need shrapnel from a critical failure to get cozy with my skull!
B.t.w. - does not neccessarily have to be related to the same problem, but upon removing the original probe, I was quite surprised to see the worn down surfaces, front & back of the transfer port; look at the attached picture - does not look normal, does it??
I decided to finally swap calibres/barrels, from my original .22 700 mm (28″), to .30 500 mm (20″). Replaced my hammer weight from my Huma-Air 13.2 gram to the 14.5 gram option from the same manufacturer. Also installed the higest-flow pellet probe, the Huma-Air pin probe.
So far, all good. Left the power I had last for the .22 - about 291 m/s (954 fps) at setting 7 with JSB Knockout .217, but dialed the power down to setting 5.
Loaded first slug (ZAN's, do not know the exact weight, but they are about the longest taht would work with a standard FX magazine). It took a lot more force than the .22, but I reassured myself that it was due to the much larger slug surface and resulting friction, as well as the minimal area the pin probe acts upon.
Fired (258 m/s, 846 fps), and again - same resistance when feeding the slug, slightly lower velocity.
So I switch to setting 7, cycle the action, and right at the end, when the slug is already out of the magazine but probably not quite clear of the transfer port, just before the cocking lever locks in the forward position, a loud POP right out from the action.
Otherwise, no indications of what went wrong - rear reg pressure held at preset value, when I took off the barrel expecting to see shredden remains of some seal or other, nothing. Everything seems fine, but I am too chicken to try again, because something is obviously not fine! Don't need the gun to go bye-bye, and even less do I need shrapnel from a critical failure to get cozy with my skull!
B.t.w. - does not neccessarily have to be related to the same problem, but upon removing the original probe, I was quite surprised to see the worn down surfaces, front & back of the transfer port; look at the attached picture - does not look normal, does it??
