WadeS and I went out again yesterday after work and shot a bunch of test groups. We had the bench out with sandbags at 40 yards. We would shoot a certain type of pellet 5X before WadeS would shoot a 5-shot group and then I would shoot a 5-shot group with the same pellet. We eliminated about 1/2 the types from my previous test. This time we tried the Crosman pointed, CPHP, Crosman Premiers (box), Benjamin Discovery HP, RWS MeisterK, JSB Express 14.3g and JSB Jumbo 15.8g. Initially it was a perfect day for shooting but a stiff breeze came up about half way through testing, blowing straight at our back.
For WadeS, the Crosman Premiers from the box (0.7" c-t-c) and the JSB Express 14.3g (0.6" c-t-c) shot the best. The rest of the pellets didn't shoot well for him.
For me, the Crosman Premiers from the box (0.7" c-t-c), the Crosman pointed (0.8" c-t-c) and both JSB pellets shot pretty well (0.4" c-t-c for the 14.3g, 0.8" c-t-c for the 15.8g).
I'll go out a third time with just these four types and narrow it down to the final one. Cost is also an issue. The CP (box) and JSB pellets are about 3.6 cents per pellet while the CPHP and Crosman pointed are about 1.7 cents per pellet.
I read something on the Yellow this past week mentioning the faster a gun shoots, the fewer pellets it shoots well. That seems to be the case here. At closer to 800 fps, it shot all the Crosman and RWS pellets well, at least in 30 yard testing. Now that my gun is at 900 fps, it seems more pellet picky.