Why are FX carbon fiber bottles only rated to 250 bar?

So, I hear so many talking about only filling to 250bar — EVEN WHEN the bottle, gun, and regulator are rated for 300bar.

And then comes Huben with the GK1 — and rates it for 350bar! 😆


🔶 Help me out:
➧Are we just overly cautious?
➧Or is the Huben so much better.
➧Or what....?



😉 I guess, I'm just venting my frustration that I bought two compact guns with 300bar — and for which I was counting on those extra shots* — and now I hear so many telling me not to use those extra 50bar....

Matthias



*Yes, thanks to the pro's on this forum I am aware that the shot count does nor rise proportionally with the increase in pressure:
For example, when filling from 200 to 250bar, those might give me 15 extra shots — and filling from 250 to 300bar might give me 11 extra shots.
But even if there are diminishing returns — it's not that extreme, like 15 shots vs. 5 shots.