Nice article on high speed photography and different pistol calibers.
The 2nd picture of a Ruger Alaskan 44mag is a bit scary. You typically see a flash between the cylinder and barrel throat. But the pic captures what looks like a big flash back on the recoil plate. Way to close to the primers of the other cylinders,, at least for me.. It also show the wasted UN-burnt power in such a short barrel.
Link to article