Originally Posted by str8shoot
They just made a mistake on their website. It says 7mm (.277) instead of 7mm(.284). They are all 7mm(.284) cartridges listed.
Some barrel makers give you the land diameter and others give you the groove diameter, and
some give you both.
The ones that give you the land or both diameter's are normally cut rifling and they are telling
you how deep the grooves are. (.284 groove Dia. and a .277 land Dia. = .0035 groove depth, or
three and one half thousandths).
But just to make sure I would call them and verify that it is for a .284 bullet.
J E CUSTOM