I started reloading about a year ago and have loaded and shot around 7,000 rounds since then. So far, I’ve had no issues with function or accuracy with any of my Gen 3 Glocks (G19, G34). Recently, however, I’ve noticed some strange behavior when shot through a Gen 4 G34. At 50ft, the Gen 4 is grouping 2-inches high and 2-inches left. The same gun shoots POI/POA with Federal HST 124gr, Speer Gold Dot 124gr, and my friend’s light 147gr reloads. Any thoughts as to why I'm seeing a POI shift from my reloads only with the Gen 4 G34?
This is the load I’m using:
X-treme copper plated, 9mm, 124gr RN
4gr Titegroup
1.150" OAL
Crimp is about .379" - .378" DIA
CCI Small Pistol Primers
Primarily Federal and Blazer brass
Loaded on a Dillon 650