Good review.Thank you John.I would like to REDUCE the muzzle velocity on my QB78S and get more shots per CO2 cartridge.I would like to get 500 to 550 fps instead of 675 fps.How can I do that?
Quote from: Earl on October 17, 2021, 12:53:12 AMGood review.Thank you John.I would like to REDUCE the muzzle velocity on my QB78S and get more shots per CO2 cartridge.I would like to get 500 to 550 fps instead of 675 fps.How can I do that?Earl, I believe this can be achieved by modifying the hammer spring to be shorter, thereby reducing the strength it places behind the hammer. A softer strike of the hammer on the exhaust valve should let out less gas, thereby putting less energy behind the pellet and leaving more CO2 in the reservoir.Not aware of any "low power" replacements out on the market, but the simple DIY solution is to take the factory spring and trim off a few coils to weaken the strength.
OK, ^&$@_=s for all QB78 issues.OPPS !!!Why can't I put the name of AA on this site??
I checked around after the video to see what the prices were like and found that of all people Amazon had the best price so I thought why not and I ordered the 22 caliber version of the rifle. I got it delivered yesterday and mounted a scope on it after I cleaned the rifle good and was pleased with the results. I have tried six different pellets in it and so far the 16 grain Poly Mags are the most accurate followed by the JSB 14.35's and the JSB 15.88's. The H&N Baracuda 18's also do pretty good but I kept getting one flyer and I know it was me so i will test them some more. I almost want to order the .177 now.Very good review JC as always.