Hey guys, I got a custom extended barrel in the works. I'm gonna have the last 1" ported. What do you guys find work best as far as layout? equal size ports? One big and two smaller? Does it really matter? At the moment, I'm going to have 4 equal size ports at the end of the muzzle...

Posting this in General as they do rifles, shotguns, revolvers, and auto-loaders. I've always been interested in porting and how well it does or doesn't work. I had a Glock 23 laying around and decided to give it a whirl. With .40 S&W running at 35,000 PSI (according to SAAMI) it seemed like...