Brass change?

[wyomingblizzard]

How much will changeing brass brands affect a load. I have a very good load for my 308 win. useing win. brass. I am needing to replace alot if not all of my current brass and Im thinking of going to lupa brass. Just wondering if my old load would be safe to use as a starting point or should I back down and start over? Current load is 46.5 grn varget with a 185 berger. Thanks

 

[Shooter264]

You will want to reduce your load at least 3 grains going from win brass to lapua.