Pittman-Robertson tax pays for public hunting land AND public shooting ranges. So we might be getting more opportunities to use airguns if they are subject to Pittman-Robertson.
It may be like my one 362 that "leaks". The bolt is smooth enough that it's possible to accidentally lift it enough the bolt doesn't seal. Have to check every time I go to shoot.
That's a tough one. I suspect yes, simply because PCP airguns WERE developed first, and suffered due to price. Top springers are still less than $1,000, top PCP $3,000+.