The chamber in the your gun is the important issue . A max factory chamber vs a tight custom chamber could be very different .
As I understand it over max brass length can form a crimp on the bullet and increase pressure.
A chamber cast of your gun chamber will tell you what your max length is. Use cerrosafe or melted candle wax in a chamber sprayed with silicone. Be sure and put a wad of
cloth or a cleaning patch at the point just beyond the chamber. When the cast is cooled push it out with a rod from the muzzle.
