cooey model 60

danastles

danastles

CGN Regular
Rating - 100%
80   0   0
for whatever reason, the odd time im shooting this rifle, the firing pin hits the shell too hard and causes gas blowback in my face. when i look at the shell after ejecting, the spot where the firing pin has hit is almost lead coloured. the ammo being shot is winchester bulk. there is a clear difference between the ones that blow back and the ones that dont.
how can i fix this? i always shoot with glasses on but i dont want anything blowing back whatsoever. is it possible the firing pin is puncturing the cartridge?
 
.
It is quite possible that your rifle has been "dry fired" too much. The firing pin on a .22 rimfire rifle crushes the rim between the firing pin and the edge of the chamber at the rear of the barrel.

On older rifles, a longer firing pin could hit the edge of the rrear end of the barrel when fired without a cartridge in it to cushion the blow, thus putting a bit of a burr, indentation, or nick in the barrel. This does not allow a lot of support for the rim of the cartridge at that point, and a thin rim will blow out.

It is also possible that the tip of the firing pin is too sharp. It should be rounded a bit without square edges. This will also lead to blow outs on thin rimmed cartridges.

Does this happen with all Brands of cartridges, or only one or two brands? Some manufacturers have thinner brass cases than others.
.
 
i have only tried the one brand. but i do notice on the blown cartridges that there is square indentation inside of a circular one. is there a quick fix for this? i have a feeling the dry firing issue may be the problem. ill try some other ammo at some point i just have none here. is there a risk of injury here at all? i dont need anything blowing up in my face.
 
I have my grandfathers cooey 60. Same thing happens to me. First time it happend, it scared the brown stuff out cause I got stuff in my eyes. Now I shoot with glasses. Anyway there are tonns of nice people with extra bolts for our guns. Just ask on the want adds. However FYI, replacing the bolt is about the same cost as what the gun is worth.
 
buffdog said:
.
It is quite possible that your rifle has been "dry fired" too much. The firing pin on a .22 rimfire rifle crushes the rim between the firing pin and the edge of the chamber at the rear of the barrel.

On older rifles, a longer firing pin could hit the edge of the rrear end of the barrel when fired without a cartridge in it to cushion the blow, thus putting a bit of a burr, indentation, or nick in the barrel. This does not allow a lot of support for the rim of the cartridge at that point, and a thin rim will blow out.

It is also possible that the tip of the firing pin is too sharp. It should be rounded a bit without square edges. This will also lead to blow outs on thin rimmed cartridges.

Does this happen with all Brands of cartridges, or only one or two brands? Some manufacturers have thinner brass cases than others.
.
Click to expand...

^ Most likely IMO
 
I was out shooting this afternoon and had about 1 in 5 blow back at me. Imediately thought of this thread and inspected the rim. The front half of the casing was black. Mine happened with 2 different types of remington ammo and no other types. It happened in 2 different cooeys.
 
You must log in or register to reply here.
Back
Top Bottom