i found a internet post on another forum, listing a 2 cavity for $100, and a 4 cavity for $140. That is retail, a good bet would be 40-50% in our EE, so say $45-50.
i am not really sure which caliber someone would use a .340 270 gr. Mostly cast is fired at a much lower velocity than the typical spitzer shape from almost every .338 bore i can think of...its the shape that is throwing me. If it was for a lever gun one would expect it to be a round nose.