No issues here with the cheapest birdshot I can get my hands on from places like Bass Pro and Academy sports (Winchester, Estate, Federal, Remington).
Jeff Martin
BLUF: Guns need shooters to do their part in order to consistently cycle. All self-loading semi-automatic weapons (e.g. not revolvers) are incomplete machines without the specific participation of the shooter.
Verging into the esoteric: self-loading semi-automatic weapons are internal combustion engines running off of pelletized fuel and they require resistance from the shooter in order to properly function. If the weapon is insufficiently stabilized by the shooter's stance or grip (relative to the earth) while springs are compressing or extending parallel to the bore-line, than malfunctions may follow because of their being an insufficient relative velocity between the primary mass (e.g. receiver(s)) and the reciprocating mass (e.g. bolt).
A pistol loaded with a single round and fired while resting on a table by a string-pull is unlikely to fully extract the fired casing - or fully chamber the following round, if at all.
If you prefer to imagine it differently, remove the engine of choice from the car of choice, place it upon the garage floor, and attempt to run it through its full operating range. Altered performance may follow.
Jules
Runcible Works
The only issues I have had running any Semi Auto with light birdshot is when “short sticking” the gun, which you will do in Rob’s class. It would be worth having a few boxes of a heavy load or training price buckshot for the short stick stuff.
Just a Hairy Special Snowflake supply clerk with no field experience, shooting an Asymetric carbine as a Try Hard. Snarky and easily butt hurt. Favorite animal is the Cape Buffalo....likely indicative of a personality disorder.
"If I had a grandpa, he would look like Delbert Belton".