FWIW I was at a shop once as a customer when another customer made a comment about legal deer hunting equipment. He said cap and ball revolvers are illegal for deer hunting.
I tried to explain how the regs were written and all I got was "they're illegal" repeatedly.
Well guess what?
They aren't.
The state considers cap and ball revolvers as muzzleloaders (gee, remember in the regs the wording "capable of being loaded from the muzzle" ???).
By type, cap and ball revolvers are NOT illegal.
But the state has regulations on muzzeloader handguns, by minimum caliber, bbl length and having to be single shot. And those rules pretty much exclude all current cap and ball factory offerings.
So one could have a cap and ball revolver, if of .50 cal min, and proper bbl length, made such that only one chamber was usable, and be legal.
You wonder why shop employees are dicks?
It's because we have to deal with loud mouth idiots like that all the friggin' time, who basically call us liars and or stupid.
Yeah, I thought that was the ruling for years, but actually contacted the state for verification.
Not all sales people (current/former) are friggin' stupid.
I spent un-told hours developing and building Hot Rod Harley's. My son and I have also built and raced Drag cars for ourselves and others The experience with those who thought they knew something was not un-like what you are referencing. Once it is read on the internet, discussed over beers or told by a guy they know it is gospel. No amount of info can turn them around.
Yup, idiots abound.
That said, you will have those special folks cross your path that listen and learn. It is a balancing act.