Upgrading Brocock Bantam .25 Beech 400cc

So a few years ago I bought a Brocock Bantam in .25, the Beech model with a metal 400CC bottle on advice from a friend who's really into airguns. This was my first airgun.



It's a nice gun, and I got it at a really good price. It shoots well, but I noticed early on that it had a very low shot count - from what I remember ~12-15 shots before velocity would start dropping. Eventually I shelved it for other airguns (namely a .22 long Taipan Veteran). Was shooting .25 airguns at my friend's the other day, and now I have the itch to shoot .25 again.



Rather then buying a whole new airgun, as much fun as that would be, I have decided to turn my .25 Bantam Brocock into a project gun. I bought an Altaros regulator, along with an Omega 580cc 4500 psi bottle. My goal is to get a lot more shots out of this airgun, and make it something I want to shoot again.



Has anyone done this before? Any potential headaches I need to be aware of? The Altaros regulator and the Omega bottle have the same threads, so they should go together fine. Will I be able to fill the Omega bottle up to 4500 psi? The Altaros site doesn't say what the regulator is rated to, but I know the regulated output pressure is from 100 - 170 bar. Does 170 bar for output pressure sound low on a .25?



Appreciate any input, you guys have much more knowledge on airguns then I do. While I have been shooting airguns fairly religiously for the past two years, I can't say that I'm an expert by any means on the inner workings on them. 
 
Thanks for the response!

That gives me hope that the Altaros will allow me to fill the Omega bottle close to it's rated capacity. I haven't been able to find any literature that states the rated pressure capacity of the Altaros. I've also sent Altaros an email to see if I could get that spec straight from them.

I got a little worried when I was reading the Huma site which states their regulators are designed only for the standard bottle and fill pressure, which got me wondering about the Altaros. 

How are you liking your Altaros regulator?