[stagpanther]

Overbore cartridges--especially new ones with little prior load development history--can be an expensive proposition to develop loads for. Barrels may not make it to 1000 shot count before being shot-out (and perhaps far short of that if shot hot frequently); and custom made barrels have surpassed the $500 mark which makes it a bit harder to digest as a regular "consumable." Take your average ladder-development bullet/powder testing total round count for just one combination (which might be 100 or more) and you can see how it's much more expensive now than it was even just 4 or 5 years ago. As a rule I never shoot more than a dozen shots at a time when testing new loads these days with cartridges that tend to run hot.