Sorry to bother you again. So this is where I am at the moment, noting I’ve never used a catapult before.
Can consistently hit a can at 10 yds. Body position 90 degrees to target and same anchor point on my cheek.
To hit targets at varied distances would involve different amounts of holdover. Do you literally rangefind and visualise these holdovers, very much like a range card?? Should I shoot paper the same as with an air rifle or am I just over thinking.
Sounds like you are well on your way and doing everything right and doing pretty well! 10 metres is a pretty standard distance for a lot of shooting and competition events, it’s what I shoot the most.
As for different distances, yes you just adjust your hold over/under, it all comes down to practice and knowing your setup, different bands will shoot differently, larger ammo will have a bigger arc etc, all comes down to what you like and what distances you intend on shooting. The best thing you can do is find what you like and stick with it, get to know your setup and just figure it out in all honesty.
For 10m shooting I use super light bands and a wide frame and for distance stuff I use a narrower frame with a much faster band. With the light setup I place the tip of the frame on my target and it is spot on, my fast setup is spot on at around 20ish meters, I aim low for anything under 20 then have to start holding over past that. I do step back drills a lot and it just becomes instinctive, take a few steps back and shoot then keep going and coming back until it becomes natural, I never think right that’s 18m I have to aim here and never use a rangefinder. I think I am also the only person I know who uses different setups for different disciplines!
Another thing to consider is your point of aim changes with different elevations too, you may not need to practice that depending on what you want from catapult shooting.
Shooting paper can be very beneficial and let you see exactly where you are at, if you can mount your target on a steel plate you will get perfect 3ishmm holes, paper tends to rtear a lot and not give clear results.