Pulled out my WW2 guncamera video and looked for the hit sprite effects on real airplanes. From the .50's on P-51's hitting the all metal German airplanes, the hit sprites we pretty closely match the ones in the video. .50's on the Japanese airplanes show fewer sprite but usually result in immediate fuel streams or fire. The cannon round explosive effects, however, look much bigger on the video than the sprites we see. The are usually accompanied but a large puff of smoke and parts flying from the airplane. Just devastating, especially up close.
(for those interested, Vol 2 of the Challenge of Flight series from US fighter Squadrons, Inc "Whispers Of Death")
MiG