​Hey everyone,

​I'm relatively new to PCPs and shoot a Gamo Arrow Magnum (.22 cal, rated for 232 bar max).

​To fill it, I bought the complete Hatsan 3-liter air tank set (which includes the cylinder, valve with gauge, and charging whip). The product is marketed and sold as a "300 Bar" filling kit.

​However, when I brought the cylinder to a local dive shop to get it filled, the technician checked the collar markings and pointed out that it is stamped PH 300 (hydro test pressure = 300 bar), meaning the actual working pressure (PW) is only 200 bar. For safety reasons, he correctly stopped the compressor at \~210 bar.

​I have a couple of questions for those familiar with these kits:

​Is this standard or deceptive advertising by Hatsan / the retailer? When a PCP kit is sold as "300 Bar", shouldn't that be its working pressure (PW 300 / PH 450), rather than using the test pressure as a marketing headline? With a 200 bar working pressure, I can't even fill my rifle to its factory 232 bar, and the usable fill count drops drastically.

​Field use: For those of you with 3L steel cylinders, do you haul them along when shooting outside, or do you leave them in your vehicle/home? Because my rifle runs at 40J with a small 125cc reservoir, 200 bar only gives me about 15–20 good shots before velocity drops, making bringing the bottle practically mandatory.

​Would you return this set and look for a true 300 bar working pressure tank (carbon or steel), or just live with the lower fills? Appreciate any insights!

Bought the official Hatsan 3L "300 Bar" cylinder set, but it's stamped PH 300 / PW 200 — did I get misled? Also, do you carry yours to the field?