Okay, per Mike's recommendation, I tried holding the B26 firmly to keep it from bucking. These shots were done on a very windy day in my side yard at 20 yards. In photo 1, the hits at the upper left were the first 5 shots without adjusting the scope for the POI from the Crosman Premium Pointed pellets. (I must have shot a different pellet last time as the POI was off). After a few tweaks to get it shooting on the POA (the circular logo in the middle of the label) I shot 5 or more pellets through the hole to the slight lower right portion of the hole. A few more tweaks of the knobs put it on the top left of the circular logo. With the label pulled off the can you can see in photos 2 and 3, this rifle shoots pretty darn good in the wind. After a little while, the pellets stopped making noise when they went through the can! Oh well. Time for a new target.
The single shot between the "D" and the "O" in the top logo was using the "O" as the POA. There was too much wind to say whether this was my error, scope misadjustment, or wind, or a likely combination of all three. Clearly though, clamping down on the B26 does result in some impressive accuracy. This from a tin of pellets which costs only $5.95 for 250!
BTW-this is just practice for me... There are no bushy-tailed rats to hunt where I live. Also, I believe in eating what I hunt, and right now, I'm not hungry enough to go after California jackrabbits in the desert. Soon maybe...