Made it to the range today. The extended mags with grip adapter make this gun much easier to control, at least for me. Now I need to finish up load development for the 180 grain bullets and then buy a bunch of brass.
The 155 grain bullets are traveling at 1355 fps average. Was hoping to see 1400 fps, but I don't see a need to push it too hard. That 155 grain at 1350 should be plenty for home defense. Although, I am getting nearly 1300 fps average with the SIG elite performance 180 grain V-Crown. Now that I have gotten some copper fouling into that barrel, velocity spreads have settled down. 15 shots with the SIG ammo today yielded 1280 fps avg velocity. Wish I could find some more full power factory ammo for this gun. If so, I wouldn't even bother loading for it, and relegate this to home defense.