Autoloading Shotgun Light Loads

[gmillwater]

I have a Hatfield SAS-12 that I love. Ultra reliable IF you use 1250 fps or higher loads of 1-1/8 oz. With low velocity (1180) 1 oz loads, it won't throw the bolt far enough to eject and cycle. The system is a hybrid gas/inertia. Gas piston unlocks the bolt and moves it back about 1-1/2". Inertia takes over from there. The bolt will move ALMOST the full travel but not enough to eject. I polished the action (bolt/hammer interface and shell carrier actuator). This helped a bit, but still won't cycle reliably.

Looking for advice from a smith that's well versed in inertia operated auto loaders.