A SFP bolt is an option and you know exactly how to get it, but you won't do it. There's numerous shops which will bush your bolt but instead your solution was to just complain about it and spend thousands of dollars on a 6.5 Creedmoor gas gun. I can only imagine the posts that are coming when you get that and don't understand the limitations of gas guns. If you're not willing to experiment with some other powders, primers, and brass to try to figure out why your loads are piercing, good luck loading for a gas gun.
It wouldn't cost you more than a grand to get a firing pin assembly and have it bushed. Your issue would be resolved and AI would no longer be assholes.