There are a few good AF tuners out there and that psi is real close depending on the power wheel and caliber, I think my .45 was close to 375psi per shot but I don’t pay attention to that anymore now that I have a 88cf tank to tether to it and my 74 cf tank is used with my other big bores. But yes the 45 is a air HOG and having your own compressor is a big plus if your going to be shooting these on a regular basis.