just put a hpa bottle on my qb

just put a hpa bottle on my qb

Joined: June 8th, 2009, 10:51 pm

May 4th, 2012, 8:32 pm #1

I have a qb79 deluxe with the xp bolt. on co2 was shooting about 500+ with 13 gr pellets. just put the ninja 13ci hpa bottle set to 950 psi. shooting 15.9 gr pellets between 611 and 621 fps. seems to be a pretty good shot count but i have not really focussed on that. I can adjust the reg to 1100 psi but I dont know how much power that would add. would like to get to 800 to 850 fps. This gun is probably a good candidate for mike melick. Any Thought?
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Joined: January 14th, 2011, 9:42 pm

May 4th, 2012, 9:02 pm #2

... and a different spring I get 840FPS or so with JSB 15.9s. Would love to have one professionally tuned by MM, keep us posted.
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Joined: April 12th, 2006, 7:56 am

May 4th, 2012, 11:13 pm #3

I have a qb79 deluxe with the xp bolt. on co2 was shooting about 500+ with 13 gr pellets. just put the ninja 13ci hpa bottle set to 950 psi. shooting 15.9 gr pellets between 611 and 621 fps. seems to be a pretty good shot count but i have not really focussed on that. I can adjust the reg to 1100 psi but I dont know how much power that would add. would like to get to 800 to 850 fps. This gun is probably a good candidate for mike melick. Any Thought?
I built a .22 QB-79 HPA FT pistol with an 800-850psi Myth regulator. Barrel length is about 13". I shoot 15.9 grains at about 570fps. You should use a lighter valve return spring and carefully port the inside radius of the transfer port.
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Joined: August 20th, 2006, 5:36 am

May 5th, 2012, 5:18 pm #4

I have a qb79 deluxe with the xp bolt. on co2 was shooting about 500+ with 13 gr pellets. just put the ninja 13ci hpa bottle set to 950 psi. shooting 15.9 gr pellets between 611 and 621 fps. seems to be a pretty good shot count but i have not really focussed on that. I can adjust the reg to 1100 psi but I dont know how much power that would add. would like to get to 800 to 850 fps. This gun is probably a good candidate for mike melick. Any Thought?
Scot (classicalgas) and Robert (gubb33ps), between those two, you'll cover just about everything that you can do to a QB and how to do it . If you get on other forums, also look for posts by Robert Sterne (rsterne), he's also done some very cool stuff.

As to what can be done, I'm also running a 13c.i. bottle regged at 1200 psi, I'm currently getting about 800 fps with Kodiaks. Needless to say, I've made a few other mods , all of them based on info from the guys mentioned above. Later.

Dave
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