I've got the kestrel 5700 sportsman and trying to get it all trued up with my cz455 for NRL22 and some 22lr ELR. SK standard + advertises a .121 g1 bc and I chrono'd it at 1030fps. Kestrel said 2.2mil at 100y but real dope was 2mil. So I added some velocity and a little bit of BC. And it matched real world dope. Went out to 250y and it called for 11.5mil. But real world dope was 9.5mil. Added some more Bc til it was way high at .185 for a g1. Went out to 350y and it called for 15.7mil and it actually took 16.2 mil. I think I'm doing something wrong. I had to put in around 1150fps and .195bc to get it to match my real world dope.