If you only get 3 loads out of your cases, they are too hot….
The OP didn’t get 3 loadings himself, he just “heard” that was
normal for “hunting loads”. Yes, three loadings is far too few for reasonable, safe loads in decent brass. And W296 is just way too slow for the 10mm, it will likely be far dirtier than 800X. The blowback action of the TNW carbine means a dirty action regardless of the powder used. The range brass the OP is using is worn out junk, he’d be advised to use new brass for safety. His “primer problems” are related to the crappy brass he uses, new brass with published loads will keep tight primer pockets for many loads. His mention of “carbine loads” worrys me, the maximum pressure is 37,500 psi
regardless of the action.
.
