Thanks Bob! Mashburn hit in on the head with the correct ratio for sure. This design just kinda integrates it with the modern accuracy cartridges and propellants. I have played with alot of 7mm wildcats, including ones based on 338 Lapua Imp cases. This one and the Mashburn are by far the most efficient that I have found.

Here is a pic of a comparison. You can see, the 7 Rogue has a little capacity edge on the Mashburn, but not much.

From Left to Right...7 Rem Mag, 7 Mashburn, 7 Rogue
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