I made a similar video about how to hold your airgun a while back but sometimes they get a bit buried in all the video I make. I feel it's really important how you grip your gun even if it's only an airgun with very little kick or recoil. Proper pistol grip is something you should use no matter what so that you can carry it forward to what ever gun you are shooting.
More kick or recoil means a firmer grip is required to hold the gun so when shooting a powder burner with lots of kick grip becomes even more important.
In this video I go over the proper two handed grip to use when holding a pistol, which hand to hold lose and which had to grip tight, how to overlap your fingers and thumbs.