Just now seen your post.
1st
Never say sorry because ‘you re new’.
Never say sorry for asking a question.
However, it would be nice if you briefly told everyone who you are and what you do with airguns.
2nd
In response to your question :
Can you fill up the 700cc bottle at 300 bars? Or 250 bars only? Thank and sorry i am new
Yes, the bottle itself can be filled up to 300 bar.
For,
Yes, bottle itself is 300 bar rated. Also applied bottle valve is 300 bar rated.
But,
No, you can t just shoot the Crown from 300 bar on. That Crown reg's delrin piston wouldn t take that too well, nor would the spring cups i guess. Certainly not in the long run.
Been looking for ways to get around that.
First went looking for a bottle connector with built-in regulator, as in M3.
Asked FX if that were possible to provide such bottle connectors/regulator for those Crown shooters using 300 bar bottle valves.
Alas...too much hassle for them so it seems.
Somewhat later asked Huma if they could provide some help.
Huma replied that 'reworking' their own M3 substitute bottle connector might be a possibility.
But since the Huma bottle connector with built-in reg is quite 'larger' than the FX original, this would result in the 700cc bottle sticking out of the Crown's wood stock foregrip end. Not practical, nor aesthetically pleasing either.
So Huma's willingness turned out no solution either. "Sigh".
Subsequently,
have bought 2 spare FX regs (latest model with brass piston) to experiment with. Intention to go using somewhat ‘thicker’ belleville cups and see how steady ES comes out once above 230-250 bar filling pressure. If spread stays below 3 m/s over longer shotstrings, i ll be somewhat surprised.
But,
That part i ll never know for sure if i don t try it. And i just know it ll be eating me, i ll always be wondering "what if...."
Yes even though if today I m reckoning little chance the Crown will ever be running consistent velocities with low ES in the 260-300 bar filling range, with just one reg installed. There's no conviction like the own convicton derived from practice.
So went looking for some serious belleville cups, fitting the FX reg.
Just recently found out that Huma has such 'stronger' belleville rings. Will include them in my next order and then start my trial and error series.
Should my +250 bar attempts ultimately not deliver the hoped-for results (on one reg), I 'll just go back to 230-240 bar starting pressure, using one of the new model (brass piston) regs, including the factory belleville rings, all brightly polished and new.
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In the meantime:
Anyone here on AirgunNation any suggestions? Remarks?
Shoot at will.