FX Impact M3 300 BAR

ScopeFX said:

I know this was covered a while ago with no reason resolution. Engraving on the Block says 250 BAR MAX. Has there been an answer if you can run a 300 BAR bottle filled to 300 BAR? Both my Impacts have 300 BAR gauges. Debating between 580CC 300BAR and 700CC at 250 BAR for more shots.

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I have asked FX and yes you can fill to 300bar as long as you have a bottle that can be filled to 300bar and sounds like they already have a 300bar gauge on your rifle.
A 700cc at 300bar for even more shots per fill !
I had a 700cc 300bar bottle on my M3 for a while, I didn't like carrying that extra 1.5 lbs.

I've had a 300 bar bottle on my M3 for over a year. No issues.

Call me a sissy if you wish, but my M3 shows 250 bar on the side of the block, so no go to 300 bar for me.
HPA is nothing to mess with, maybe the bottle will take the pressure, but apparently per that notice, the rifle may not.
I'm not willing to take that chance for a few extra shots. Besides, I have experienced poorer accuracy with a higher fill (250 Bar) than when the pressure drops down to the 210-220 bar range. It will then shoot more accurately within that bar range.

Mike

Revoman said:

Call me a sissy if you wish, but my M3 shows 250 bar on the side of the block, so no go to 300 bar for me.
HPA is nothing to mess with, maybe the bottle will take the pressure, but apparently per that notice, the rifle may not.
I'm not willing to take that chance for a few extra shots. Besides, I have experienced poorer accuracy with a higher fill (250 Bar) than when the pressure drops down to the 210-220 bar range. It will then shoot more accurately within that bar range.

Mike

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The rifle may not? Per what notice? FX used to say they were planning to sell the M3 with a 300Bar bottle after supply issues were resolved. There is lots of FX direct documentation stating they are good to go with a 300Bar source. FX has also stated the breech block and front reg are rated to handle a 300Bar source in multiple instances. I understand not everyone wants to fill higher than 250Bar for many reasons, but according to the designer and producer, the M3 is safe at 300Bar. HPA is certainly dangerous and has been the source of many injuries and fatalities, so I would never fault somebody for choosing to stay on the conservative/safe side of things.

All that said my M3 has a 300Bar bottle that I fill to about 260-270Bar. As far as shot count goes I get more than a 250Bar bottle, but I noticed diminishing returns past the ~270Bar fills. There is science to support this and in real world application there is a balance of efficiency.

As an addition point of information, I was just reviewing the FX M3 owners manual to help another thread; and it states:

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

Only place I would be Leary about is the plenum. It seems to be kinda on the thin side for that much pressure and reg do fail and pass the full bottle pressure to the whole rifle. The passages in the trigger block and power block seem to be thick enough. Personally I'm just going to stick with 250 bar.

"The rifle may not? Per what notice?"
It's just the imprinted information on the "FX" receiver block (not the serialized butt block). The rifle has 250 bar max imprinted on that block at the bottle pressure gauge and that is the notice that is referred in my earlier input.
Just answering the question.



Mike

I have been filling my M3 ,s to 280 bar ever since I first purchased them.....never had an issue..

Been filling mine to 300 bar from Day 1, no issues other than the standard POI shift, which I have sorted out now.