KodiakBeer said:
"Light" is a very subjective term.
Yes, it is. However from your descriptions of what you're doing, and the video you posted, it both sounds and looks too light.
Put another way - use that same grip pressure on your 1911 and shoot some standard .45 hardball loads. How much control do you have over the gun? I'd wager it'll flip around in your hand enough that you'd have to re-acquire a good grip after every shot.
That is too light of a grip.
You can get away with it in a full size, steel framed Hi Power. But you can't get away with it in anything lighter, like aluminum or polymer frame guns. Or something not full-sized. Or with something more powerful than that super-light 115gr 9mm.
It's not a good technique. Not even the schools and instructors teaching speed are teaching students to shoot with such a grip technique.
KodiakBeer said:
Why would you think it wouldn't?
Because it wouldn't.
You're able to get away with a grip like that with those soft 9mm's in a full size, steel frame gun. As I mentioned, try it with say, a Glock 23 in 40 S&W. Or a LW Commander in .45 ACP. Or even a Sig 229 in 9mm with some rounds that have a better performance than light, 115 gr range practice rounds.
You can let that Hi Power jump around in your hands under it's own power specifically because of the gun you're using - full size and heavy - and the round you're shooting - light and gentle.
It's a poor technique. Hey if you want to use it, have fun with it. But you're not going to convince me it has any value for a serious student of the art.