Maybe I complicate things here for you by adding this. I don't re-load for pistol, just precision high power centerfire rifle. Knowing how far the bullet "jumps" into the rifling is critical for load development. If the rifle is magazine fed, what will just fit into the mag is usually the limit unless rds are single loaded by hand.
I use this gage by Hornady to determine this dimension;
https://www.bing.com/videos/search?q...3&&FORM=VDRVRV