I'm new to the whole QB thing, having picked up a .22 2078A in trade at Findlay a few weeks ago. I'm getting just about 70 shots out of two carts before velocity begins to fall off. This is at 75 degrees in the basement, with no sun. Is this good, bad, or average? I have no idea if the gun is stock or massaged.
Overall, Im pretty impressed with the gun. Accuracy at 7 yds seems worthy of the match sights. It will continually put them in the same hole if I'm on my game.
If it was, I picked up the QB79 he had next to it and it was stock.....until I modified it. Would go on a limb to say it was in the same boat as far as being stock at the show...
You got lucky if you didn't need to do any work to it. Mine needed new seals, and the 3.5oz tank needed a new valve. Otherwise it is a slick and accurate rifle...my first exposure to QB's too. It is a real tack driver, and has lots of power.
I just spent some time in the back yard, at about 28 yds, and the damn thing hits like a target rifle. I'm pleased! to say the least. Trigger is nice, accuracy is surprizing. I'm still shooting Walmart Crosman hollowpoints. So far, so good.
I'd say that your gas mileage is great! I normally find about 50 shots is an average number for a QB78-family air rifle in stock condition before the muzzle velocity drops enough to change the point of impact significantly (maybe 60 shots for a .177 caliber model).
Of course - as Steve pointed out - if an HDD is fitted to your air rifle, that would make a significant improvement on stock performance.
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