Heads vs. Skirts

Bill, head diameter is the real determining factor in accuracy not skirt diameter. Skirt thickness will determine seal, hence velocity and bc but has darn little effect on accuracy. 10 yards is much too close a distance for determining overall accuracy. Since you're shooting silhouette I'd test your pellets at 45 yards from some form of cushioned rest if it's a springer.

I've given up on the cheap pellets. Get JSB's, Beeman FTS or Crosman Premier by the sleeve and their price including shipping is competitive with the Walmart pellets. And they will certainly out perform any of the pellets from Walmart at 45 yards.

I never understand the 'I won't pay shipping and handling' mentality concerning pellets. You'll spend gas and time going there to pay for pellets that are inferior? I own 5 Chinese spring guns. None of them shoot pellets from Walmart with any form of acceptable accuracy past 30 yards. However they'll shoot any of the quality pellets I mentioned with darn good accuracy out to 40 yards. My SM-1000(B-21 prototype) will shoot Beeman Kodiaks at sub 1" at 50 yards from the FT shooting position with iron sights! The only cheap pellets that I've seen shoot worth a darn were the Green labeled Chinese Match pellets that weighed 8.8-9.0 grains. I had two tins of round nosed and other than the weight, the were identical to JSB Exact 4.51 pellets. I don't know if they're still imported but they really performed as good as JSB Exacts 8.4 and Crosman Premier 7.9 in just about every gun I tested them in.