Conflicting Max Fill Information - FX Impact M3

From the manual: Charge the rifle to wanted pressure without exceeding maximum pressure limit of air reservoir or main block.

My M3 has 250 bar Max. Pressure printed on the main block.

Geezerhood,
Some have installed 300 BAR bottles and 300 BAR valves to convert to that usage, but your current system is 250 BAR. If the second line on your tank says, 0.5KG 0.58L PW250, you've a 250 bottle, your third "vote" to confirm. WM

As copied from the manual (on line !) .

5.2 Pressurize Max overall pressure in system: 300 BAR Max air reservoir pressure:
See markings on air reservoir.

SEE second sentence (in red) !

I fill mine to just over 200bar.

Mike

Agreed, very dangerous, in my opinion, too. You're not the first to be confused and high-pressure air is nothing to have any confusion about. If they wanted to state the gun "could" handle 300 BAR, they should have said it with the warning that special equipment needed for that pressure. Maybe, in Sweden, they look at things and explain things differently than we do. WM

@Geezerhood ,
You are correct. Your manual should not list 300 bar. Cross it out and write in 250. As others have already pointed out, following the markings in your receiver/action. Go with the limit of the weakest link.

Manuals aren't perfect. I would guess they are frequently written to cover several models and configurations and they just don't spend the time to make every single manual specific for what you purchased or assembled. The voices of experience here will help guide you.

Your valve spring and hammer spring and regulator may work in better balance at the lower pressure stated on the receiver.

It may be possible to fill to 300 a few times and get away with it before some seals start leaking. It took more than a year of doing this for the seals in my Edgun regulators to begin leaking and cause regulator creep. I think marketing has hooked on to that higher rating because people want to get more shots per fill.

The standard Buna and 70 durometer o-rings and grooves that are typically used in airguns without special backup rings and such start to deform and leak more readily as you approach 250ish and beyond.

GL,
Feinwerk

So are all of you saying that Fx is marketing 300 bar upgrade bottles knowing it will cause stress on their rifles and premature failure in order to meet the demand for more shots?
I've been using a 300 bar bottle, fill it to about 275, on my Maverick. The main reason is I can shoot my usual four mags at the target, then leave the rifle on the dining room table with a mag next to it for any wayward pests the happen upon my backyard without having to refill the bottle.

dens228 said:

So are all of you saying that Fx is marketing 300 bar upgrade bottles knowing it will cause stress on their rifles and premature failure in order to meet the demand for more shots?
I've been using a 300 bar bottle, fill it to about 275, on my Maverick. The main reason is I can shoot my usual four mags at the target, then leave the rifle on the dining room table with a mag next to it for any wayward pests the happen upon my backyard without having to refill the bottle.

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The only additional stress from using a 300 bar bottle would be to the first regulator. Obviously it's designed to handle it.

hawkeye69 said:

The only additional stress from using a 300 bar bottle would be to the first regulator. Obviously it's designed to handle it.

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That's what I was thinking too. All that additional air pressure isn't getting past that. Makes sense.

I think one is the 300 bar bottle max pressure and the gun is 250 bar..

cosmic said:

I think one is the 300 bar bottle max pressure and the gun is 250 bar..

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Exactly. I called and talk to FX about this and that is exactly what they said

fx performs best in 200-240 range.

dens228 said:

That's what I was thinking too. All that additional air pressure isn't getting past that. Makes sense.

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Until your reg fails and goes into the bypass mode. Now you have 275-300 leaning on your second reg. Can probably still handle it by why. Filling guns is so easy nowadays. Unless you’re still hand pumping these things. I fill both my Impacts to 250b for routine shooting. Fill my Compact to 265b only on days I take it hunting because it gives me exactly 2 mags. There are marketing trends and things that get guys excited in this hobby. A couple years ago it was “Power Plenums”. Everyone had to have one, didn’t matter what kind of gun you had. Screwing them on Dreamlines, Wildcats, Taipans and even Avengers. Now it’s the 300b fill craze. Maybe that’s why FX left that door open. Buy the M3 and down the road we will sell you the stuff to make you a big 300b filler guy. Hence the manual.

As they say, "a chain is only is as strong as it's weakest link". I always fill to the lower of any pressure I see on the bottle or gun.

What I do is to fill 100 psi less of maximum allowed by what is written in the block of my rifles. I have never had a problem EXCEPT when I changed a regulator that instead of working at 300 bar works at 250.I noticed a lower fps and now I never fill again above 250 bar that rifle.