Originally Posted by joshmb1982
i shipped it off to springfield armory today for them to look at. as for the questions. yes they are all xdm 40 mags. says it on the floor plate and a round count of 16 on the back. as far as parts of it being for a 9mm. i cant say for certain no. didnt take a mic to anything. but the pistol does fire and eject spent cases. i field strippd in many times and didnt notice any burrs anywhere. there are parts with a fairly sharp edge but it feels smooth to the touch. mags insert and drop free with ease. with the full 16 rounds in the mag and slide closed it is fairly hard to press the mag release button. when i work the slide slowly by hand the shells are spit out of the side. though when i was fireing it a few emptys did land on the top of my head.
looking at it with a fried at the range the opinion of it was that the extractor was to tight and didt give the rim enough space to reliable slide up under it.
Josh, every new (or new to me) autoloader I get I measure the extractor pressure. I have shims for different calibers and a trigger pull scale. Ejectors do not have a specific pressure setting. Most are process controlled during production and some manufacturers tune them during final inspection.
So why do I measure them? Because it gives me a baseline and when I go out to shoot I pay attention to how the gun spits the empties and determine if the slide cycle speed is correct. If the hot brass doesn't hit me in the head or go down my t-shirt I'm happy. Now a week or year later if the gun exhibits FTE or starts to smack me with hot casings I will go back to my records, re-measure and compare. If there is a shift I know which direction to go. (more or less pressure) Oh yea, I check the recoil spring for breaks or loss of length.
That's why I like the 1911. It is so tunable. I get a kick out of shooters that complain about getting hit in the head with hot brass. Fix it! If the gun is running well other than the brass LZ change or replace the recoil spring. (read: cycle speed change) Or tweak the extractor pressure. (read: more pressure holds the brass longer while engaging the ejector and less pressure allows the brass to fly sooner)
Rule # 1. This aint rocket science.
Rule # 2. Dont tell anyone that. Be the wizard!