My whole approach is pretty lackadaisical when it comes to alloy, bullets, casting, and shooting. I have never enjoyed shooting full power rifle ammo for fun and target work. I find anything that recoils much more than factory .30-30 to be unpleasant and unnecessary for the pleasure shooting that I do. I enjoy offhand shooting at knock down mild steel targets at ranges up to 210 yards on my home range, and rest shooting out to a quarter mile again at knock down steel targets.
I found that ammo with a muzzle velocity of 1,800 fps and faster damages my targets and recoil begins to become noticeable especially since I'd often be shooting 50-100 rounds in a session.
Holding the vast majority of my ammo in the 1,400 to 1,700 fps velocity range allows me to be pretty darned casual about things like alloy. I shoot plain base up to about 1,400 fps and check everything faster than that. Plain old air cooled wheel weight alloy is adequate, when sized to .311" for my .30 caliber rifles and loaded with reasonable care regarding case prep and neck tension I can count on 2 MOA ammo. My bore get treated like my .22 rimfires. A pass with a patch on a jag with Ed's Red, followed by a dry patch and never any leading.
For the small amount of ammo where I want jacketed bullet performance, I simply, (gasp), use jacketed bullets.