Ladder tested 300 win mag/240MK's and Retumbo


Well-Known Member
Jun 13, 2007
Wilmington NC
Re: Ladder tested 300 win mag/240MK\'s and Retumbo

Work some 5 shot loads up in that range, play with seating and see what she does. Think you will find that it shortens the tuning process.



Well-Known Member
Mar 19, 2002
Prince George British Columbia
Ladder tested 300 win mag/240MK\'s and Retumbo

Loaded 20rds starting at 73grs. Went up .3 at a time. Quite a horizontal spread at 200m spread was 6". The 10th,11th,12th,and 13th. tucked into .380moa so I gues thats my "sweet spot"? The 14th climbed high and left and the 15th blew the primer so I stopped there. Not to much for pressure sign before that though. A bit of flattening and slight cratering. Federal Match primers. Win brass. I guess this is how its done?

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