Got an issue and looking for some feedback.
Without going into the long story, I built a 35 Rem in a M93. Head space is good and firing pin protrusion is .055". Rifle fires with reloaded R-P cases and new ammo from a major supply, no issues. However, with new brass from that same supplier, I am getting a very light primer hit and the cases do not fire. To my eye, the cases look to have a malformed shoulder. Brass was sent back to the suppler who is suggesting that my striker fall is too hard and pushing the shoulder back before the primer can go off.
With all due respect, I think this is absurd. If this was true why would the other cartridges work.
The tech with the supplier said that he was able to pop the primer on one of my cases with an XP100. My guess is that the XP100s extractor is able to hold the case close to the bolt face. My M93 has a large amount of clearance to aid with feeding, and feeds fine.
Case in the middle is new, the ones on the sides are R-P cases that have been fired and sized. What are your thoughts?