For each handguns, I measured trigger pull by averaging out 5 pull results. I also posted low measurements for the majority of them.
Here are the results:
Bersa Thunder 380 Plus -DA - 7lb even, with a low of 6lb 4oz
SA - 3lb 10oz, with a low of 3lb 9oz
Beretta PX4 Storm Compact -DA - 9lb 4oz, with a low of 8lb 15oz
SA - 3lb 12oz, with a low of 3lb 3oz
Springfield XD Mod.2 Subcompact -3lb 13oz, with a low of 3lb 8oz
Ruger SR9C -5lb 7oz, with a low of 5lb 1oz
Glock 19 -5lb 5oz average with a low of 5lb even
SIG Sauer P320 Compact -5lb 7oz average with a low of 5lb 3oz
Metro Arms American Classic Commander (1911) - 2lb 15oz average with a low of 2lb 8oz (!!)
I had no idea that 1911 would measure that low. It's one of three 1911s that I own, but it's also one of the best that I own. I knew it was good but didn't know the trigger would generate such a low measurement. I'll update this page later tonight with the results of the triggers of the other two 1911s, just to compare all three of them.
I measured my 1911s:
Rock Island Armory MS 1911 (22tcm) - 2lb 12oz average with a low of 2lb 10oz
Rock Island Armory MS 1911 (9mm) - 3lb 13oz average with a low of 3lb 8 oz