I've noticed that my cocking lever seems like it's being hit by a hammer when firing a pellet (or possibly being hit by a blast of air within the mechanical assembly of which the cocking lever/rail is part), which imparts some vibration onto the entire rifle. This doesn't happen when dry firing the gun. Do you have the same happening on yours?
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Brocock/BRK Ghost owners: please check if your Ghost’s cocking lever is jolted when shooting pellets
- Thread starter spinj
- Start date
Yes, the cocking lever is completely closed. All o-rings are good. I’ve actually posted the same question for the person who made this video:
The question asked was:
What is the purpose for that center grub screw on the chassis directly on the valve (on which you apply grease at 11:05 of the video)? I’ve noticed that when I fire a pellet while touching the cocking lever the lever moves as if air is leaking through something to cause it. Could it be that since the rail rides over that grub screw an air blast is emitted from around it (grub screw) and causing the rail/cocking lever to move?
The grub screw to which I’m referring in the video plugs a hole within the internal compressed air region/cavity of the firing chamber. I’m thinking that since all of the air will not escape out the barrel when a pellet is fired, some of it will escape around that grub screw, which is directly below the cocking rail linkage. I am questioning what the reason is of drilling a hole and screwing in a grub screw in that particular area.
This is the grub screw:
The question asked was:
What is the purpose for that center grub screw on the chassis directly on the valve (on which you apply grease at 11:05 of the video)? I’ve noticed that when I fire a pellet while touching the cocking lever the lever moves as if air is leaking through something to cause it. Could it be that since the rail rides over that grub screw an air blast is emitted from around it (grub screw) and causing the rail/cocking lever to move?
The grub screw to which I’m referring in the video plugs a hole within the internal compressed air region/cavity of the firing chamber. I’m thinking that since all of the air will not escape out the barrel when a pellet is fired, some of it will escape around that grub screw, which is directly below the cocking rail linkage. I am questioning what the reason is of drilling a hole and screwing in a grub screw in that particular area.
This is the grub screw:
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Here’s another photo of the grub screw, the purpose of which I’m questioning, identified in the parts diagram:
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Did you try feeling for any movement or vibration by touching or placing your finger on the cocking lever while firing a pellet?
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Upon closer inspection, that threaded hole on which the grub screw goes is directly above the air transfer port that channels the air to the barrel. I think that was the drill bit’s entry hole to drill the hole to make the transfer port and when drilling was complete the grub screw was inserted to plug the entry hole. If indeed air is escaping from or around the screw, BRK didn’t use any sealing agent (o-ring, teflon tape around the grub screw, Loctite, etc.) to prevent any air leaks due to air escaping around the barrel, which might be causing the vibration, and why I’m getting some inaccuracy.
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