Whelen Away: Here you go. I think this is a drawing of my Mashburn reamer so you can play with numbers. My eyes are too fuzzy in the middle of the nite to start playing with numbers. smile

I have measured once fired Masburn WW cases many times. They hold 90 gr of water to mouth of case. Ditto for all my pals who now have Mashburns.

Other than a shorter neck there is precious little difference between the Mashburn and the 7mm/300 Win. They are both very good cartridges.



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The 280 Remington is overbore.

The 7 Rem Mag is over bore.