I also shoot pellets because they are simple , in a fast reload you can't dump powder on the ground . As for 100 ver 150 grain , in my neck of the woods , most shots are 100 yd or less so I shoot 100 grains . In my gun 150 gr is slightly less accurate , but it kicks a lot more. I shoot 2 - 50 gr pellets of 777.

NRA life
DU
Pheasant Forever