I got to try the new bullets today, as expected the heavier 50 and 55 gr. did not stabilise well in my CZ either with a low load of 2.2gr Red Dot or a faster load of 7.4 gr. Lilgun.

Three of the 55 gr and one of the 50 gr. showed very marginal primer flattening with the Lilgun, the 40's were fine and would probably stand a little increase.

I don't see any way of obtaining subsonic loads with Red Dot, I'm somewhat cautious about putting an even smaller amount of powder in the case.

https://www.dropbox.com/s/pqq6hl7b5te62bs/001.jpg?dl=0
https://www.dropbox.com/s/pnnc7a2gt2njj7t/002.jpg?dl=0