primer blow by

[garyo]

buckhorn 209 breach plug getting primer blow by, any way to fix it.

 

[GM54-120]

What rifle?

 

[garyo]

cva opitma

 

[HC]

Shim the firing pin bushing out flush, use Winchester primers.

 

[GM54-120]

Call CVA....DONT TELL THEM you are trying to stop blowby.

Tell them your firing pin bushing is not flush with the frame and you want to get a shim kit.
Shim the firing pin bushing out to get a .003 crush on a Win209 or Nobel 209 primer.
Try not to go over a .003 crush to avoid problems

https://cva.com/product/firing-pin-shim-kit/