Re: Tomahawk (300 RUM imp.) vs WarBird???
I think you took Len the wrong way. I think he's only stating that he wasn't guessing is all, and that the case capacity increase is minimal, therefor a standard MV improvement could be reasonably assumed to be what he stated.
It's simple math and that's all, case capacity that is. Volume is easily figured out with the new and old dimensions.
I would also guess that your throat is longer like the one in Tim's Tomahawk specifically for the 240gr SMK, but of course you could do that to the Ultra Mag as well, gain efective case capacity and still use factory dies.
I will pay you for 5 of your fire formed Tomahawk cases.
The Ultra Mag cases are just what they are, a case design that is 99% maximized in almost every way possible right from the factory, which is good, just that the cost is higher to improve a case (any case), the gain really has to be worth it to drop an additional $275-350 on dies... for all but a select few I guess.
If the case had a 7-8gr capacity increase it would be seriously looked at by ME TOO, and for good reasons. But what I can't get over is that a gain of this to take place, it would require the case to be MUCH longer to the shoulder than it is.
How you get the speed you do, well there's a few ways to explain the numbers you see.