Try the AA pellets in 4.51, 4.52, and 4.53. Do the same with JSB Exacts. I know they look the same, but I have 7 TX's and 2 of them have a great preference for AA fields in 4.51. The others prefer the JSB Exact in 4.52. Try all the pellets you can find and, when you find the magic pellet, buy all you can afford from the same batch.