It's a pain to find reasonably priced small pistol primers. The election year has everyone on edge, and prices have been crazy. Those Argentinian Servicios and Adventuras primers you mentioned are intriguing. They are a decent deal at $50 per 1k compared to the alternatives.
Considering the more complex primer cup and reduced sensitivity, it's understandable why you might hesitate to use the Argentinian Servicios and Adventuras primers for significant matches or self-defense. However, their reliability in going bang on the second try makes them suitable for practice or local matches, providing a potential solution for your needs.
It's excellent that they fit right dimensionally and seat with proper resistance. Your S1050's handling of them well is a plus. And it's good to know that Vibraprimethat is loading them into the tube without issues.
I've been looking for
Large Rifle primers for sale lately, and prices have also been all over the place. It is a tough time for all of us in the reloading community.