Don't use cast in the carbine?....Really?.........I've been shooting cast in my carbines/garands & a Ruger mini-30......Forever.......Never clogged a gas port.....Probably never will.....If it should happen would be easy enough to clean it out..........
I cast 100 gr .30 Luger bullets in a Lee .311-100-2 mold for a couple decades and I've lost count of how many I've put through this carbine and a previous carbine that went and loved with the ex wife.
I used wheel weights with 1.5 percent tin added via 10/90 bar solder to get good fill in the mold, dropped them into a 5 gallon bucket of water out of the mold to quench them and let them cure a few weeks. They made great rounds for plinking for not much more than a .22 LR.
I did have to remove the gas tappet every thousand rounds or so and clean the gas port but it was a 5 minute task.
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I loved Hornady's 100 grain half jacket bullets (they disappeared for awhile, but they are back). They were very accurate and I could get 2200 fps out of them with a max load of H110. At that velocity they'd generate 1090 ft pounds of energy - over the 1000 ft pound threshold, but SD GF&P still considered the .30 carbine to be too underpowered for deer, regardless of what you loaded it with. However, they worked great on coyotes, jack rabbits, badgers, etc.
Now I just use 110 gr plated bullets from Berry's or Xtreme.
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