T3s have been the worst Iv seen. The ones with misfires had rust build up on the taper to the point that it was jamming in the bolt body creating light strikes. Id guess its a combination of the steel tikka have used coupled with a thought process that being a stainless rifle it doesn't need maintenance. Finding the cause of miss fires is a process of elimination. A good look at the primres that failed should show either a good or a light strike. If its a light strike with T3s the most likely is a rusted firing pin but superdivers dosnt appear to be the problem here. Next Id check the sizing process, if the shoulder is bumped to far the case will have to much room and not hold firm against the pin strike. If the crater looks good like its had a good strike then primers can be an issue but its rare and 2 in a row seems even less likely. Im not a believer in the not handling primers thing. While oils etc can make a primer inert its very difficult to get enough oil off your hands with normal handling, maybe if you use to much hair gel and you are preening while priming? Brass can be the cause, iv seen the odd case with no flash hole or a bad pocket but again 2 in a row pushes that idea down the list a bit for my way of thinking.
It could be anyone of the above or something else like meths or solvent getting on the primers somehow, a bit of crap in the bolt body, the bolt not closed properly and closing /firing almost in battery which gives light strikes.
It may be something that doesn't raise its head again and youll never know for sure what caused it.
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