With Wildcats, it's all been done before.
When we talk big cases, the three big "Boogie Men" are:
- it's "Overbore";
- it's "Inefficient"; and
- it's a "Barrel Burner".
"Overbore" seems to mean that there are no suitable powders available for it, i.e. they're all too fast to approach a full case and get maximum velocities. Neither the 9.3 RUM, nor the 6.5 RUM would fall into that category, but the 6mm RUM would be limited to at most one or two powders (e.g. US869).
"Inefficient" seems to mean that there's another cartridge that can achieve the same velocity at the same pressure with less of the same powder. So what. The 30/30 is more efficient than the 308 which is more efficient then the 30/06, which is.......... Pretty much meaningless, in a practical sense, unless the extra nickel a round you spend stresses you, and the big potential velocity upside of the round is not worth it to you.
"Barrel Burner" - seems to mean that the more powder you burn, the quicker the barrel will wear out, which is generally true. Use of spherical powders seem to reduce wear, and keeping the heat down helps, but the barrel will wear out faster. If you shoot a lot and replacing a barrel after 5,000 rounds as opposed to 10,000 stresses you then it's a factor.
