A 10-shot sample of the Winchester USA load #USA357SIGJHP... ...achieved an average velocity of 1418FPS with an SD of 18. Chrono is the CED M2 with screens an average of 10 feet away; temp. was c. 95d.F. Glock 32 with 4.5" barrel. The group size was certainly adequate--very narrow with some vertical stringing. I shot a few of the Speer 125GD LE load to verify chrono performance; it averaged slightly less than the last long string I measured. I plan to expansion-test these WWBs and retest the several other candidates by using fabric in the front of the 1st bottle. I think I'll use 3 layers of denim with 2 layers of cotton flannel in between.