COAL, jump and accuracy in pistol reloading

[JustBC]

I am working up loads for 9MM. My local club has a Ransom Rest. It is easy to see how charge and bullet weight effect accuracy. I am curious how much jump effects accuracy with 9mm/45 ACP. I know seating depth will make a big difference in pressure. How much will it effect accuracy? I understand that most ammo is probably more accurate than I am. I don't want to burn a bunch of time chasing ghosts but I still want to turn out the best product possible because I am That Way.
Thanks.

 

[918v]

It affects accuracy just like in rifles. It’s just that most pistols are so loose you can’t see it. But get a Swiss Sig P210 or a bullseye tuned 1911 or Beretta and you’ll see it.