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Airguns by Make and Model => Crosman Airguns => Topic started by: Perry01 on June 15, 2014, 06:23:32 PM

Title: New Gas Ram in NPSS impressive chrony numbers
Post by: Perry01 on June 15, 2014, 06:23:32 PM
The FPS in my NPSS started to drop below 700 so I figured the gas ram was getting tired so I ordered a couple from Crosman. All I can say is wow! It used to be a 20 FPE airgun but lately it dropped to 16-18 FPE.

Now, after 50 or so pellets, it's shooting 14.3 gr CPHP pellets an average of 850 fps for 23 FPE.

It's a bit harder to cock but that doesn't really bother me. The great accuracy is back as well.

Here are a few screen shots of the chrony.
Title: Re: New Gas Ram in NPSS impressive chrony numbers
Post by: Geoff on June 15, 2014, 07:59:57 PM
Have to love it when FPE jumps and you dont lose accuracy.  nice numbers there for sure
Title: Re: New Gas Ram in NPSS impressive chrony numbers
Post by: Perry01 on June 15, 2014, 10:50:11 PM
Yea, if I would have known the velocity would increase so much, I would have replaced the gas ram a long time ago.
Title: Re: New Gas Ram in NPSS impressive chrony numbers
Post by: LAalex on June 16, 2014, 12:37:49 AM
My guess is you're getting some dieseling.  Once the lube burns off you should settle in @ around 17-18 FPE.

Scotty
Title: Re: New Gas Ram in NPSS impressive chrony numbers
Post by: Perry01 on June 16, 2014, 01:16:46 AM
Quote from: cajunboy on June 16, 2014, 12:37:49 AM
My guess is you're getting some dieseling.  Once the lube burns off you should settle in @ around 17-18 FPE.

Scotty

What lube?

I just replaced the gas ram. The piston didn't come out and I now got over a hundred pellets through it since replacing the gas ram and velocity is still 850 fps.
Title: Re: New Gas Ram in NPSS impressive chrony numbers
Post by: Charles Outdoors on June 16, 2014, 06:54:02 PM
Those are some sweet numbers. That's what I was hoping the NP2 would be around there.