So here is my experience today after trying out my .357/.410 combo. 2 blown primers in the .357 and 2 in .410
Now I'm not going to go into great detail about all the ammo as I don't believe that is the issue.
I believe there are 4 possible reasons for this, and if you own this firearm you can look at yours to understand my view point.
When I lift my guns breach lock slowly the spring pressure from the extractor starts forcing the breach to open but that spring pressure doesn't allow it to re-close unless force is applied by myself to re-close it. I believe when you fire the gun, the recoil it causing the breach lock to "jump" now it could be "jumping" because the extractor it applying to much force, or the breach lock spring is too weak, or one or both parts of the breach lock has not been machined to proper spec. or a combination of all, some or something else I haven't thought of, I don't know.
All I know it that out of the 40 rounds of .357 my breach was opened after 9 of those rounds were fired. In case someone thinks this is a "design feature" for quicker loading I don't want to hear about it/not funny.
A firearms breach should never open from firing unless you physically open it.
Not a gunsmith and don't pretend to be, but on my rifle the breach is attempting to open, and I feel this is the reason I have so many primers that show unusual signs(more than just the 2 blown ones).
I feel confident that downward pressure on the barrel when firing would allow the breach to open faster, and allow for possible case head separation, but I wasn't willing to sacrifice my face to prove a point.
I will contact TPS first to see what their take is on my issue. Just wanted to let the OP know he's not alone on this one.
