Wanted to share my results casting for the .30 carbine
I use this lee .311 100 grain mold: https://leeprecision.com/mold-dc-311-100-2r.html
With mostly range scrap, they drop at 104-105 grains. Then I powder coat them with harbor freight red, and size down to .309
I use 2400, and tula small rifle primers. All in all my material cost is around $0.08 per round buying stuff locally. Ordering in bulk could probably lower that.
Accuracy and functioning are good, I wouldn't call it tack driving, but I wanted a plinking load and got one, I haven't shot it past fifty yards, but I have put probably 2-300 through my crappy gen 1 universal, with the only hang ups being caused by a new-production korean magazine I have.