GTA
All Springer/NP/PCP Air Gun Discussion General => "Bob and Lloyds Workshop" => Topic started by: rkr on May 24, 2021, 05:22:48 AM
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I'm considering moving the probe sealing o-ring in one of my guns from barrel to probe to make bullet loading smoother. Making an o-ring groove to the probe is easy part but I'm wondering what material could I use to fill the old o-ring groove in the barrel? As it is now the o-ring catches grooves on the bullet causing a bit violent loading event which I think is not good for consistent feeding of bullets.
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I would fill it with JB Weld but accept the possibility that I may ultimately want to cut off the offending area and re-do the leade.
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What about installing an undersized teflon O-ring in the barrel groove? Something the projectile will glide over.
Coordinating the placement of the new probe seal with the old barrel groove may be tricky. Especially unless you follow the advice of nervoustrigger above.
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Thimble and Loctite?
Or perhaps a slew-cut Delrin ring to fill the groove.
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I did the thimble thing, allows barrel indexing and I can experiment with bullet seating depth.
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I did the thimble thing, allows barrel indexing and I can experiment with bullet seating depth.
Sounds like a Great solution. Leaves open a lot of options.
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I did the thimble thing, allows barrel indexing and I can experiment with bullet seating depth.
Sounds like a Great solution. Leaves open a lot of options.
Works great too, I shot 12.5mm ctc group yesterday at 100m.