I am a fairly careful handloader and the 7mm Mag makes me nervous. My last 7mag an early SS barrel Remington that was really clean wouldn't hit 2800 before ejector marks and cratered primers with 175 NPTs and a few feet per second better with 160s. That was with Retumbo.
With those results I don't blame you for being shaky on it. That's pretty freaky but goes to show what can happen to a cartridge when the barrels/chambers, etc et vary so much.
Of course you gotta watch RETUMBO.....that shidt WILL jump around on you lot to lot,and gets touchy at top end. We used it in the Mashburn where it recorded some very high velocity but we did not trust it.
That's why we use H1000 today.
