Border Patrol in the USA actually allowed some members to carry, so long as they qualified with the .50, I remember the Guns and Ammo issue where they did an expose on it.
The casings hitting you in the forehead is from locking the elbows and taking the torque in the wrist. Let the elbows float and the gun just lifts up, throwing the cases behind you.
My trigger and 757Fixer's triggers are very smooth, and light, I've done nothing to mine other than adjust with the screw, no sandpaper feeling there. But mine and his are both Israeli manufacture. I did hear that during the short time they were made in the USA that there were some problems with them.
I've never had a jam unless the gun was so dirty you could hardly move the slide by hand, once cleaned it was no problems for probably 1500 rounds at least. Mine is sitting quite high up on the use scale, often getting 250-400 rounds through it at my gunshows (each day, no lube or cleaning) for the last 5 years, plus all the shooting I do with it. I've got at least 10,000 rounds through it, and am on it's second set of springs. Deadly accurate out to 100yds, and hell of a lot of fun on pumpkins and steel plates.