Grayguns range report for the SIG SAUER P320

Howdy! Roy and I each obtained full-size SIG Sauer® P320 9mm pistols for research and development testing here at Grayguns. We’ve come up with a killer trigger system for it based on an idea Roy pursued, but that’s a subject for another time.

Obviously, we are accuracy-oriented shooters, and we have our sights set on the NRA Bianchi Cup next in 2015. So, a first step in determining whether the new P320 might be competitive in the Production Division is to see how the stock pistol groups with our standard NRA Action accuracy loads.

SIG SAUER P320 Testing

To that end, I fired 12 groups from Roy’s gun at fifty yards off bags today, using both 115 and 124 grain Hornady XTP’s. Interestingly, Roy’s pistol consistently dumps the first manually cycled round WAY low and right, about 5″ out of the core group. This indicates some lockup and slide to frame fit issues we’ll deal with when we build these up.

Excluding those first-round flyers, the worst group I got was also my first, at 3.8″. Once I changed glasses and settled down behind the gun, everything started to fall in. The best group was my last, and ran just under 2.4″ for all six rounds.

The average was about 3″. That’s for a mechanically stock P320 with substantial rattle in the slide fit and lockup. I can’t wait to see what these will do once fitted properly.

Bruce Gray