A quick up-date on two posts: co2 12gr. wood stocked Hammerli 850 and a 12gr. lite striker QB 79 HPA conversion.
There go my plans for the summer. Either of these two will get the job done just about as well as the other (Job being pest birds in the back yard/garden during the off-season).
Not a whole bunch to choose from at the 20-25 yard ranges that cover the normal back yard (I could back up down the patio and make it 32-33 yardsif I thought retreat was the better part of valor).
The two rifles (OK.."carbines"):
HAd thought the 12gr.running 850 would have beeen the "it" gun for ther summer. Kind of 10meter match speeds (6-6.2 foot pounds) and enough accuracy to count on. Tweety-birds are tweety-birds, they don't take a lot of "oomph" to blow thought them.
THEN...got all involved in a 11-12gr. striker project on a QB 79 HPA tanker. More like 9 foot pounds X 435-450 shots per fill.
Which as far as the MINIMAL difference in tracjetory is concerned over the 2-=25 yards, it's mnot "JACK". 13.4gr. at 543fps vs 7.9gr. at 562fps just doesn't cvome out to any useful difference in trajectory at short range.
(Yep...if long range was on thew menu, would have piocke3d a different rifle than either of these two.)
Somehow did they do as back yard plinkers?
With the RWS/Hammerli/Umarexm 850, I did buy a 2nd dual 12gr.,tube, then prompley disarmed it into a single 12gr. adaptor. Just removed the 12gr. popping piece from the front end and let it run on one 12gr. (and a full 12fr, at the front).
A good solid 48 shots from that single 12gr. That will translate into +105 shots for dual 12g. (can get into the "why" of that non-proportiaonal increase in shot count if your really need to).
VERY BIG PLUS for shooting the cherapest .177 pellets avialible local.... it the store has ANY pellets ,they will have Crosman 7.9gr."generic" tins (And a nod to Crosman for one *(&^ of a marketing job...they really went all out to cover the market.)
TYted for a single 10 shot group each day. Each day it took a trip with me to and from work, laying in a gun sock on the floor boards of my Jeep.
It looked like ti got aweay from me on day 2...but basically, it stayed stable enough to be totally usefulduring a fill.
I do know which one I want come winter (QB 79HPA) but duri9ng the summer, am more likely to pick the 850/12gr. co2 for the ease of operation.