I made this video to show how Yuto Muramatsu uses his short pips chopping technique against all kinds of loops - fast balls, spinny balls, and everything else.
Hope you find it useful!
He's using Victas Spectol S1 in 1.6mm and a Nittaku Goriki Danshi blade. Short pips chopping is different from long pips chopping, and it's more difficult. There are some similarities, but not too many.
I also play with Spectol S1 in 1.6mm on an ALL+/OFF- blade. It has good power on forehand and backhand attacks, and it's good for chopping with the right technique.
It always depends on what kind of ball your opponent plays, so it's hard to generalize the technique.
Here are some important parts of short pips chopping that I figured out for myself, and hopefully, they'll help you too. This might not work for OX short pips or some other types, but it works for me:
Wait for the ball to fall down.
Try to hit the ball close to your body if you can. Don't stretch forwards too much.
Sometimes you need to start with your racket high and above the ball, and sometimes at the height of the ball. You'll need to figure out when to use which movement.
Move quickly and get yourself where the ball will be falling down - if you have the time and can guess where it'll land.
Keep your hand relaxed, and tighten it when the ball hits your racket and when you're holding the ball. This is easier with a softer blade.
Swing down with your forearm and wrist - both together at the right time.
Similar feeling to backhand loop with inverted rubber.
If you use a bigger arm movement, you'll lose control, but sometimes it is necessary.
Before your opponent hits the ball, watch them closely and anticipate how they'll play it - placement, spin, speed, arc.
This isn't always possible, especially against better players, but you should still build intuition.
For a spinny ball - take the ball late, let let it fall into the sponge and "through" the ball to generate your own spin. Keep your hand relaxed to let the ball work with your blade and sponge.
For faster, more direct, and less spinny balls, it will be more difficult to take the ball when it is falling, so you also need to do a quick movement where you chop from up to down.
Let the ball generate spin in your sponge, and let the blade absorb the speed. Hopefully, the ball will have a low arc over the net and spin on the opponent's side. If you are too tense or hesitate with the movement, the ball will pop up high and it will be easy for your opponent.
Ideally you can avoid these kind of loops.
I probably missed some things, and some of this advice might not work for you like it does for me or others.
I can update the description in the future if anything changes.
Let me know what you think in the comments!