Don't use light loads. First, make sure there is some interference when you close the bolt. If there is not, you should neck up to 30 then neck back down to 280 with the die backed out to provide interference at the shoulder/neck juncture. GD
Greydog is correct....you don't want a light load. I can't tell you how many times I have had to fire form a case twice because I under loaded it.
When I tried the neck up/down method, the necks ended up short after fire forming. I found it was better to just load the bullets long, pressed into the lands to get the case head back tight against the bolt face, and fire it.
Tony
