FPJ problem solved.

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Been playing around with this for 2 months now and thought I would share for any one still using FPJ.
Get you some o-ring as in the picture, load a primer in the FPJ and stick the o-ring in the open end and push it down I use a wood dial and no more blowby in the action and everything stays clean it’s been working great for me.

The primer top of picture is a fire primer and only tested with black powder I haven’t tried sub yet.
 

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Now that's a nifty trick. I'm betting a lot of people using the primer carries are going to appreciate this little tip. Nice work!
 
Been playing around with this for 2 months now and thought I would share for any one still using FPJ.
Get you some o-ring as in the picture, load a primer in the FPJ and stick the o-ring in the open end and push it down I use a wood dial and no more blowby in the action and everything stays clean it’s been working great for me.

The primer top of picture is a fire primer and only tested with black powder I haven’t tried sub yet.
Would you be able to provide the McMaster-Carr part #? The one on the bag does not come up. I would like to try these.
 
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