For volume plinking in my 300AAC AR's, I have been looking around for some cast bullets. Most of the cast bullets I have found information on, are heavy 200g+ for sub's. I am looking around for bullets under 150g that will feed in the AR platform. I have no desire to get into casting my own right now, I am looking for commercially available options.
Secondarily, I have been looking at any number of the various powder coat options, instead of lube. As I understand it (having only ever loaded cast pistol rounds with lube) after the PC process, the bullets need to be resized. Should sizing to .309 be sufficient, or, should I open up a die to .310?