@Chomps
This is unsolicited advice, feel free to disregard.
I have a bunch of 8-11” MPX that I zero regularly.
Ballistic calculators for pistols usually assume pistol barrel length and velocity.
PCC can pick up 100-300 fps depending on the ammunition.
If you’re going calculate ballistic drop, you have to chrono the ammo out of your barrel or find data from someone with a similar gun.
My procedure for zeroing:
1. Wheeler laser to get optic close at home. I usually try and match it up at about 20 yards or so with the laser.
2. Go to range and get the most rock stable rest or position I can possibly get. I have a couple of really SOLID rests that don’t allow any wobble. And I pin myself into a corner so I’m not wobbly either.
3. Use 2” round pasters on a clean sheet of copy paper.
4. At 7 yards, I’ll take a shot and adjust windage to try and get dead on. Will also try and put the elevation to impact about 1-2 inches low. If the shot is at center or higher, I dial it down or else it’ll definitely be too high at distance.
5. Then I’ll move the target out and take a few more shots. But call each shot. If you have a bad press, ignore that impact. I’ll usually take a couple at 15, but dial elevation down if any shots are at or above center. At that distance on the 2” circle, if your aim is dead on the impacts should be just towards the bottom of the circle.
6. Then I’ll move out at 25 yards and take 3-5 of the best trigger presses I can muster and then check the target. If they’re reasonably clustered around the center, I’m done. If not, adjust and repeat.
A modern gun should be able to do a 2” group, so do your part.
For something like a self defense gun, I’ll do all the steps with training ammunition of similar velocity to the carry ammo. Then just 1-2 shots at the end to confirm.
Typically if I have a good rest and good trigger presses, I can get the whole process done in under 10 rounds.