Expert PCP GURUS

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This gun fills to 300 BAR!!!!!!!!

My Impact only fills to 250? Why?


 
Like said different materials used and wall thicknesses. 

Just because a gun can fill to 300 bar doesn't mean it's necessary. My .30 Flex is capable of 300 bar fills when regulated and 250 bar when unregulated. But I have it tuned right now for 21 shots at 85fpe unregulated with the string starting at 2700psi which is 186 bar. I'm debating on tuning it for more shots at a higher pressure but it's nice having such a low fill pressure.

Regulated filling to 300bar doesn't gain you much really if you think about it. Sure more shots per fill technically but it's over a wider range of air so your not saving anymore air you just technically don't need to refill as fast. Now if you don't have your tank with you when shooting I can see the issue but if not there's no real benefit
 
Like said different materials used and wall thicknesses. 

Just because a gun can fill to 300 bar doesn't mean it's necessary. My .30 Flex is capable of 300 bar fills when regulated and 250 bar when unregulated. But I have it tuned right now for 21 shots at 85fpe unregulated with the string starting at 2700psi which is 186 bar. I'm debating on tuning it for more shots at a higher pressure but it's nice having such a low fill pressure.

Regulated filling to 300bar doesn't gain you much really if you think about it. Sure more shots per fill technically but it's over a wider range of air so your not saving anymore air you just technically don't need to refill as fast. Now if you don't have your tank with you when shooting I can see the issue but if not there's no real benefit

Thank you for answering my question.
 
Pressure vessel design calculations require thicker wall thickness and that drives up weight and cost. I used to design pressure vessels for power generation, and the hoop stress calculations are the same. This is why a long skinny tube gun is cheaper than a bottle gun


Oh, yes, explain that a bit more, plz!

I get so aggravated at PCP makers who produce a very long gun, but then they make the air cylinder real short instead of all the way out to the muzzle.... And I want to shout out to them: "Don't shortchange us on air, you already made the gun large, might as well give us a large air supply!"

And I get aggravated at PCP makers who make these thin little air tubes.... And I want to say: "This tube is barely thicker than my pinkie! My goodness, give us some air!!"

And some guns would just look cooler with a bottle than a little airtube.... And I always thought, "Why don't the make more bottle guns?!" Well, you already have begun explaining that. Keep going! 😊

Matthias