Bergers can be a little picky, but once you find the sweet spot, they are awesome. This is my 7mm WSM shooting 180 grain Bergers at 200 yards. The 2 shots on the top and right were the sighters, after moving to 200 from 400.
There are 6 bullets in that group hole:
Berger says this:
The quickest way to find this sweet spot is to load ammo at four different COAL. Start with a COAL that allows the bullet to touch the rifling. The next COAL needs to be .040 off the lands. The third COAL needs to be .080 off the lands. The last COAL needs to be .120 off the lands. One of these COAL will outperform the other three by a considerable margin. It has been reported that the VLD bullets don’t group as well at 100 yards but get better as the bullet “goes to sleep” at further ranges. We have learned that by doing the four COAL test you will find a COAL where the VLD bullets will group well at 100 yards. Once the COAL that shoots best is established you can tweak +/- .005 or .010 to increase precision or you can adjust powder charges and other load variables. Frankly, those who do the four COAL test usually are happy with the results they get from this test alone.
Hope that helps!
Bookmarks