250Z Max reg pressure for stock components?

[BSJ]

What's the maximum reg. pressure I can realistically expect with the stock components of a .22 250z?

 

[Bladefin]

I'd think that max on the reg isn't what one would be looking for. Too many variables.

Projectile weight and finding the grouping at a psi and hammer setting. I mean you could crank the reg to 3k psi, have it wasting air, be loud as he ll and shoot a buckshot pattern.