Side of primer sheared when seating

Hiya!

   I had a similar thing happen to me once, but it "was" due to my not noticing a crimped primer pocket in some mixed cases I was using up to finish off a run of 50 of the same mnfr. cases. I set the one aside that had the primer semi "squished"/damaged, and looked over the other odd cases & found 2 more that had crimps.

(The damaged primed case was not looking like what you described, but instead had a part of the side of the primer sticking out above the case head so it would not have been usable at all.)

So, I took the large primer reamer "bit" out my Lyman case tool and put it into a drill like a bit & reamed out the ones that had the crimp & then took the case with the messed up primer & removed it carefully with the sizing die, and reamed that case as well.

Then continued to load the other 49. I did save the case though, so it was not really much of an issue but for a wasted primer I could not use. I made a load noise with it later on with a hammer & a chunk of steel RR track for an anvil. Kind of like a kid & a roll of cap gun caps. ;-) Safety precautions used.

My own suggestion about this would be that , to me, it is not worth the possible trouble of trying to use that primer and perhaps cause an issue I do not want to have with a possibility of ruining a fun session of shooting/hunting/etc. IF there was a problem.

I would go the route I took & just carefully remove the primer & re-use the case after it is reamed, or if ya don't want to try to remove it now, then just put it into the firearm ya were loading for & fire off just the primer with NO Load in the case to make sure there is minimal or no pressure, when ya do go to shoot the other rounds.

That way no bad issue should be a result from setting off the primer & you can still use the case later.

Either way that ya might choose to deal with the damaged primer would remove the possibility of damage to the firearm or you/others by trying to shoot a loaded round with a damaged primer.

The cost of one primer is not worth the chance of a possible issue that perhaps could occur & safety wise for me, the firearm & folks around me if there were any, I think it would be the better choice to deal with it in a non loaded case.

Up to you of course.
G'Luck regardless of your choice on how to deal with this.
:-)

P.S. - I saw now that I am posting almost a week after the OP posted. Maybe the situation has already been taken care of, but I will leave the comment I made anyway. :-)

P.P.S. -  I have been informed by another member that this was an old post from 2020, and I am a year & a week late. Oh well. Leaving it anyway. LOL :-D