I shoot only brass cased ammo out of 1911's. Just personal preference. I'll use it in a Mini 14 or Mini 30, but not my handguns.
I have purchased 4000 rds. in the past year or so 2000 7.62 x 39 and 1000 each of .45 acp and 9mm and I have never had a problem not one fail to fire in several thousand rds. I put 100 through my p-10 yesterday and again no problems at all. I have used a good quantity of Wolf as well without issue.The 7.62x39 is very poor quality. Inconsistent primer seating does not work with my Mini 30. I can not see where quality would be good on other calibers if it is bad on one. No problems with Silver Bear and Wolf works.
Do you mean lacquer and not polymer? The lacquer issue is actually an old one, that problem has been pretty much remedied by the manufacturers. But like anything on the internet, issues never die they just get forwarded.If brass cased, it should be ok.
Some of the pistol steel case ammo has a polymer coating. During strings of rapid fire, it may start out okay, but as the handgun warms up, the polymer creates FTE's in some.
Then when the polymer cools, you really have to clean up with more than solvent to remove the polymer.
While it was issued to the military, they did not shoot the handguns at the rate a competition does.