WHAT DOES CUSTOM FIREARMS MEAN?

I’m in a small town 40min South of Denver, CO. I joined mainly to find out more details on my father’s 1959 Design 70 .300 H&H Magnum. I don’t hunt, so I’ve only taken it target shooting so far.Commemoratives were developed in reasonably substantial quantities and Therefore the “rarity” making the collector benefit is grossly under the