Which knuckles do the hitting in boxing?

[HerbM]

[FYI: I am reading, re-reading etc Championship Fighting, Inside the Ring by Ross Enamait, Boxing by Haislett, and the Champ Thomas booklets...]

When I wrote the following it turned out that I had NOT read Dempsey (Championship Fighting) closely enough.

...
Then after reading Dempsey's book I tried the ring finger aiming technique.

...

The way I do it is to roll the arm a bit more over so that my hand is beyond knuckles-up/thumb-inside (about 30 degrees), and move that target knuckle directly on center line.

At this point, the angle between my chest and arm would be (slightly) decreased if nothing else were changed, so I also rotate a little bit further and this means that the I can straighten the line between back toes and striking knuckle even more. The feeling (subjective) here is definetely one of increased power from both the extra rotation and the extra rear foot power.

It also feels looser, easier to make that turn -- the turn comes naturally without being forced. I just 'think' about the target knuckle hit and most of the rest just follows.
...

Dempsey actually recommends turning the hand LESS for straight punches to the head when aiming with the ring finger and using the falling step.

He recommends hitting with a vertical fist -- not a horizontal one:

A stepping straight punch to the head should land
with the fist in an upright position to keep the punch straight. The instant you turn your fist to land palm-down in a head punch, you will begin to
loop the punch.

So I was wrong.

But wait, I may have discovered something useful, too.

If I want to add the shoulder whirl to my punch, then overturning it definitely helps. Later in the book, Dempsey instructs on the "shoulder whirl" and does recommend turning the fist (to palm down.)

It is when adding the should whirl that turning the fist is more important and correct.

I however, was already adding the whirl to the falling step (Dempsey also indicates this can be useful), and then turning the fist even MORE seems to work for me.

I would greatly appreciate it if any of you who have read and followed Dempsey's adviced would try this on the bag.

1. Falling step punch with vertical fist
2. Falling step punch with horizontal fist
3. Falling step punch with 'overturned' fist (about 30-45 degrees past horizontal)
4. #2 with shoulder whirl -- turn shoulders almost parallel to direction of punch
5. #3 with shoulder whirl -- turn shoulders almost parallel to direction of punch
6. You can also try these without the falling step, but only (some of) the whirl.

...and let me know what you discover, feel, and think.

I get a nice loose long punch with #5 that can include the falling step or not -- I can optionally leave out the shoulder whirl depending on my target and what I want to deliver.

[Now I am working on Hooks, and having both a frustrating and very interesting time - maybe I discovered something new here, but I have to get back over to the gym tomorrow to test it out. ]