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Free miner-Thanks for your quick response. I was suprised when the brass got shorter because the old Gibbs book I read said to use 30.06 cases or trim cases .270 cases to 2.494"(30.06 length). I thought that since the 30.06 neck was created by necking down the case from .441 (or there about) that the copper for the expansion would come the previously necked down case. The .270 Gibbs case is supposed to be 2.5" long so I expected the case to get longer since the Gibbs book says to trim to 2.494. Like I said I'm new to reloading wildcats. I'm really more concerned about working up a load. For example the old Gibbs book shows a max load for the 150 gr. bullet of 56 gr of IMR-4831. I've seen loads on other web sites that say the max. load for the 150 gr. bullet to be 66 gr. of IMR-4831. To me 10 grains is a big spread!

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Boy, is it ever! Since IMR 4831 and IMR 4350 are within a grain or two of one another in cases like the Gibbs, I think 66 grains of it with a 150-grain bullet would be pretty HOTT!! Even limited to a mere 3000 FPS with the 150 grain bullet, this should be a very impressive round!