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All Springer/NP/PCP Air Gun Discussion General > Machine Shop Talk & AG Parts Machining

Barrel Breech Leade Taper Rate

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Ronno6:
What is the Barrel  taper rate for a .22 barrel?
Is there a standard taper reamer to achieve this?

Motorhead:
What application ?
 
Break barrel / PCP / Flush seat or deep seating all have a "Best" so no generic anwser here

Ronno6:

--- Quote from: Motorhead on September 29, 2024, 01:24:11 PM ---What application ?
 
Break barrel / PCP / Flush seat or deep seating all have a "Best" so no generic anwser here

--- End quote ---

I am looking into machining a Crosman 362 barrel to fit a Daisy 822 MSP.
Requires shortening, turning the ends to fit valve body and front sight
and machining the breech ID for loading.

Motorhead:
Not familiar ... how does the pellet load, is there a transfer port and a probe seating pellet deeper than flush ?

Ronno6:

--- Quote from: Motorhead on September 29, 2024, 02:51:03 PM ---Not familiar ... how does the pellet load, is there a transfer port and a probe seating pellet deeper than flush ?

--- End quote ---
The pellet loads into the breech of the valve body.
The transfer port is in the valve body, not the barrel.
The barrel buts up into the valve body maybe .060" beyond the TP
The bolt probe should about push the pellet skirt at or just past the edge of the TP....
Does this mean that the barrel does not need  any taper??
That would be great!

The 362 barrel does have a TP, hence the lead taper??
That will be removed for use in the 822........

Update:
I have half of an 22X barrel that must have come from a police auction...it was cut in 2.....
A pellet dropped into the breech end drops freely so that the end of the skirt is maybe 1/8" past flush.
The pellet drops into the loading end of the bore of the 362 barrel about the same,
but when dropped into the muzzle end, the skirt comes flush with the muzzle....

So...........back to the original question, I suppose..........

Maybe just a gentle grind with a Dremel while in the lathe??

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