So I put together a new 300 BLK pistol from PSA. It's an 8.5 inch. I had it out to the range to check the function and sight in scope before I paint it. Anyways shot 4 different supersonic loads got it sighted in easily. shot a couple hundred of those. Before I left I loaded up 5 Hornady Black 208gr subsonic. It will fire 1 round and return to battery without stripping another bullet out. Then obviously a click. Pull and release charging handle, or lock it to the rear and use bolt release and it loads a round then the same again. I've read that barrels less then 9 inches may not cycle without a suppressor with subsonic ammo. Which would be fine as that the plan anyways. In just trying to figure out if its under gassed because of the short barrel does it have enough power to eject a shell but not move far enough back to strip a new bullet out? Otherwise I cant see how it could eject and also go back into battery without taking a bullet with it?