Gas Rammed CFX test

Well, to make a long review short, the GR CFX 22 was chrony tested side by side with a stock, untuned CFX 22 and , in a nutshell, the GR shot from 90 to 140 fps slower than the stock CFX. Testing was done indoors on a CE chrony with the indoor lighting kit. The averages below were obtain from 5 shot groups for each of the ten pellet types. I shot 5 from the GR, then 5 from the stock CFX at the same bull to minimize pellet placement induced errors. Pellets were not weighed, but were given a cursory visual inspection. Stock CFX has about 700 pells through it.

Crosman CPL GR CFX avg-556 stock CFX avg-650
Gamo Hunter GR CFX avg-490 stock CFX avg-630
RWS SD GR CFX avg-562 stock CFX avg-689
Beeman FTS GR CFX avg-542 stock CFX avg-660
Gamo Match GR CFX avg-567 stock CFX avg-694
Predator GR CFX avg-534 stock CFX avg-630
Cromag GR CFX avg-503 stock CFX avg-593
Gamo Magnum GR CFX avg-522 stock CFX avg-620
RWS SHP GR CFX avg-571 stock CFX avg-685
AA Diabolo F GR CFX avg-490 stock CFX avg-580

Cocking effort was significantly higher for the GR, but very smooth. Accuracy of both guns was exceptional, 1 ragged hole at 7m for most pellets. Recoil felt was much different for the GR. Rifle was not hold sensitive. GR was quite loud, in fact, it left a ringing in my right ear. Trigger was the typical long, creepy, crunchy Gamo, but had a predictable release.

I really wanted this gun to shine. If it had been only a little slower than the stock gun, I would keep it, but for the cost difference and the fact that for a few dollars more I can get the Benjy Discovery, I think this one will have to go back. Maybe I got a dud.

[johncedarhill]

Those results have to be terribly disappointing!!  What strikes me  is the difference in the noise level accompanied with reduced power.

[yel01z06]

i was about to order one after your post i think i will spend my $ on something else thanks for the review

[Splash]

Whatta bummer:0 looks like I can scratch that one off the list.

Mike

[Big_Bill]

Hey Bill,

I have been waiting for this review since the GS CFX was first listed. And I feel as bad as you concerning the poor results, I would think that Pyramyd Air would have performed extensive testing before bringing a substandard CFX out with there Gas Ram System installed, I guess it was a rush for the money !

Thanks for sharing the results of your testing with us.

Bill

I'm glad I didn't put in the trigger I got from CDT.

[Gene_SC]

Well guys you can only get so much juice out of a turnip.. I think for a .22 it is a bit to much to ask allot of fps. The extreme deviation should be great and of course accuracy will improve, but using a gas ram in a .22 is kinda mute, considering a spring .22 would be a much better bargain.. Unless they can make a more powerful gas ram with no additional cocking effort the .177 would be the best bet for the use of a gas ram.
After months of watching CDT doing R&D on his gas ram design, I realized that the good ole spring is much more efficient and easier to cock than the gas ram was. In order get the fps up you need more pressure and pressure equals to cocking pressure.. Not that I would not want to have a gas ram in one of my S1K's.... But I would not want the en vestment unless there was a remarkable difference.

Just my two cents...
Gene

Talked to the tech at PA who does the majority of the conversions on the CFX and he said they test each one and the all have shot heavy pells in the mid 600s, so I'm gonna send this one back and get a different one, so I'll keep everyone informed.

[nyairman]

Thanks for the review Bill. I hope your replacement will be a winner!

Greg

[shadow]

Well what a drag :0 I was kinda hoping for some uplifting chrony #s or maby a break in period for the gas ram. Maby it was a dudshooter and thing's will pickup with the next one. If not then scratch her off my list and I'll just keep springing along. Thank's for the review and hope the best on the next one. Ed