whats your best performance with Bobs SSG in 22 cal regulated at 28-30 fpe?

[plinker81366]

in fpe/ci/shot

[plinker81366]

pls include barrel lenght thanks 

[Hobbyman2007]

Have mine tuned at 20 fpe ,but should give you an idea. 13 ci tanker gun gets 130 shots from 2900 psi to 1100 psi . This is with a 20" barrel getting 1.62 efficiency.

[Dairyboy]

Not regulated but can give you an idea 20" barrel
http://www.gatewaytoairguns.org/GTA/index.php?topic=104259.msg986241#msg986241

[rsterne]

My 2260, with a 13 CI tank regulated at 1600 psi, gave the following at various stages of tune with the SSG.... This is with 18.1 gr. JSB Heavies....

11.4 FPE (532 fps) = 6 psi/shot = 2.12 FPE/CI
18.3 FPE (675 fps) = 10 psi/shot = 1.98 FPE/CI
24.4 FPE (779 fps) = 16 psi/shot = 1.67 FPE/CI
31.3 FPE (882 fps) = 23 psi/shot = 1.52 FPE/CI
36.7 FPE (955 fps) = 28 psi/shot = 1.46 FPE/CI



So at your power level, I would have gotten about 1.6 FPE/CI....

Bob

[plinker81366]

thanks bob at 885 or 31 fpe with the 2260 set up at 1600 output, is it with a slight downslope velocity? thanks

[plinker81366]

Have mine tuned at 20 fpe ,but should give you an idea. 13 ci tanker gun gets 130 shots from 2900 psi to 1100 psi . This is with a 20" barrel getting 1.62 efficiency.

very nice, i might try that power level someday, thanks for the data, btw are you using 14.3 grn pellets?

[Motorhead]

My personal Bottle converted & Regulated .22 M-rod
Has regulator , a Light hammer & SSG fitted.
360 cc tank w/ 18.1's @ 865 fps ( 30 ft lbs ) does 95 shots = 1.72 efficiency

* added energy data

[Hobbyman2007]

Have mine tuned at 20 fpe ,but should give you an idea. 13 ci tanker gun gets 130 shots from 2900 psi to 1100 psi . This is with a 20" barrel getting 1.62 efficiency.

very nice, i might try that power level someday, thanks for the data, btw are you using 14.3 grn pellets?

I'm actually using 15.89 grain jsb or the 13.4 grain jsb .forgot to mention that I have the regulator set at 1250 psi.

[shorty]

I know it's not the topic but;

Short stiff spring, huma regulated mrod (set at 1500 psi), 20 inch barrel, opened valve with .168" exiting to barrel (190cc):

18.13 grains at 1.77 fpe/cuin for 28.3 fpe
14.3 grain at 1.78 fpe/cuin for 24.5 fpe

[rsterne]

My gun is on the knee of the curve (barely) at 37 FPE.... so at 31 FPE well down on the knee, approaching the downslope, at 1600 psi....

Bob

[thelast88]

My personal Bottle converted & Regulated .22 M-rod
Has regulator , a Light hammer & SSG fitted.
360 cc tank w/ 18.1's @ 865 fps ( 30 ft lbs ) does 95 shots = 1.72 efficiency

I assume that you have high reg set point if you get only 95 shots from 360cc of air, and with that good efficiency, something like 2000psi?!

In my friends Mrod (factory barrel, huma regulated, has some valve and TP work), he has 73 shots @ 27fpe from 3000psi with H&N Baracudas, so efficiency is 1.56.
With this setup, and with 360cc of air, he should get at least 135-140 shots. 

[plinker81366]

My personal Bottle converted & Regulated .22 M-rod
Has regulator , a Light hammer & SSG fitted.
360 cc tank w/ 18.1's @ 865 fps ( 30 ft lbs ) does 95 shots = 1.72 efficiency

* added energy data

wow, must be at least 24" barrel lenght, at 1700 reg set point?

[plinker81366]

My gun is on the knee of the curve (barely) at 37 FPE.... so at 31 FPE well down on the knee, approaching the downslope, at 1600 psi....

Bob

thanks Bob, i thought that this would be a good baseline number for 22 that is 30 fpe at 1.7 fpe/ci/shot

[Motorhead]

My personal Bottle converted & Regulated .22 M-rod
Has regulator , a Light hammer & SSG fitted.
360 cc tank w/ 18.1's @ 865 fps ( 30 ft lbs ) does 95 shots = 1.72 efficiency

I assume that you have high reg set point if you get only 95 shots from 360cc of air, and with that good efficiency, something like 2000psi?!

In my friends Mrod (factory barrel, huma regulated, has some valve and TP work), he has 73 shots @ 27fpe from 3000psi with H&N Baracudas, so efficiency is 1.56.
With this setup, and with 360cc of air, he should get at least 135-140 shots. 

Yup @ 130-132 bar .... spring preload cranked up some more & 21 grain pellet will do @ 33 ft lbs but efficiency dives.

[Motorhead]

My personal Bottle converted & Regulated .22 M-rod
Has regulator , a Light hammer & SSG fitted.
360 cc tank w/ 18.1's @ 865 fps ( 30 ft lbs ) does 95 shots = 1.72 efficiency

* added energy data

wow, must be at least 24" barrel lenght, at 1700 reg set point?

20" TJ barrel at @ 2000# set point ( 130-132bar )