M1 Carbine gas piston

[eb in oregon]

What is that coating called they dip the lead bullets in?
I've seen multiple colors. But just can't remember what you told me it was called.
Do you think that coating and gas checks are the way to go for lead shooters?
What would be the ideal Brinell hardness rating for carbine speeds? Does 18 sound right?

I believe you are thinking of powder coated bullets, which are available in multiple colors. "The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals, such as household appliances, aluminium extrusions, drum hardware, automobiles, and bicycle frames." The powder is applied electrostatically and then the bullets are baked for a bit. It is my opinion that powder coated bullets are as restricted in velocity as standard lead gas checked bullets. While the coating is easily applied to bullets it still isn't all that hard IMO. But then that's conjecture on my part as I won't be using "PC" coated bullets within this lifetime, I've already enough to last the rest of my life.