- Joined
- Jan 4, 2022
- Messages
- 3,098
- Reaction score
- 7,003
First time I’ve seen this. I’m using a .035” thick o-ring in an OEM TC Omega plug which causes the 209 to sit fairly proud of the plug.
Using Fed 209As.
Plug was clean to start (reamed).
Headspace did not seem overly tight. Crush with o-ring measured at about .003-.004”.
Flash hole measured at .029”.
Temps were warm - about 80 degrees.
One 209 to foul then two shots.
First shot 400 gr bullet with 110 grV BH209. Second shot 260 gr bullet with 120 grV BH209.
Two shots yesterday showed that the primers bulged on the unsupported sides. The lower half of the sides are clean so no leakage past the o-ring, but there is slight cratering on the firing pin impression, some flattening and some carbon on the primer face indicating leakage around the primer cup.
Thoughts on what is going on here guys?
Using Fed 209As.
Plug was clean to start (reamed).
Headspace did not seem overly tight. Crush with o-ring measured at about .003-.004”.
Flash hole measured at .029”.
Temps were warm - about 80 degrees.
One 209 to foul then two shots.
First shot 400 gr bullet with 110 grV BH209. Second shot 260 gr bullet with 120 grV BH209.
Two shots yesterday showed that the primers bulged on the unsupported sides. The lower half of the sides are clean so no leakage past the o-ring, but there is slight cratering on the firing pin impression, some flattening and some carbon on the primer face indicating leakage around the primer cup.
Thoughts on what is going on here guys?