Bit drastic that Steve. It is just a matter of findinga batch that works and buy x50 tins. This way you know you have stock of a pellet that works.
I have found that the newer style JSB that are filled really far back and look like an accupell drop far more than the older style that are not filled back. I got some die 22 a box full and managed to win at Cambridge with them last year with a 58/60. I then went on to sell them. They weighed like nothing else I had seen before truly amazing. The die 4 I have now go through all of the guns I have so happy days.
You can never shoot enough pellets