how much power qb 78-79

[john uk]

 hello , What sort of <<  MAX >> Ft lbs power can you get out of a 78/79 using .22 using  a piped 2kg Co2 bottle,?,,But still keeping accuracy looking to shoot at 50 Yds,,,

[rsterne]

I've heard of 20 FPE (.22 cal) at ~90*F (30*C).... I don't think you'll get that high at 70*F (20*C).... The accuracy should be relatively unaffected by the velocity, as I have great shooting HPA versions shooting 30 FPE plus in .22 cal.... Just a matter of finding a good round nosed pellet the barrel likes at those ranges.... I assume you're looking at an FAC version then?.... since staying just under 12 FPE is pretty easy....

Bob

[john uk]

Yes (fac) was hoping  Poss  30+ftlbs could even go HPA route if needed,,
was going to use that 9mm shinsung air tube with a 78-79 breach/barrel to get the power
but without a valve carnt do the project,,

[Kailua]

You could check in the vendors gate for valve upgrades with Flying Dragon or Mac 1 Airguns.

[VAFarmer]

15 ftlbs at 70 degrees is pretty common and can all be done with very little investment other than time.
That energy can be accomplished with just one cart, but only for about 25 shots.   Still, good power from a single cart.
My next one will be a cart version with a power adjuster, set to around 14-15 ftlbs, wide open at hopefully 60 degrees or so, that can be cranked back in adjustment, so as the day wears on and gets hotter...will still put out ~ 15 ftlbs.

HPA should get you close to 30 I would think......with the 9mm barrel.

God bless,

Farmer

[rsterne]

You can achieve 30 FPE in .22 cal with extensive mods on HPA.... you will never see it on CO2 in .22 cal.... possibly in a larger caliber....

Bob