I sent my Forster .223 FL die out to them to have the neck opened up so as to not work the brass as much. My loaded round neck outside diameter is .2503 using Lapua brass and Berger 70 gr VLD. The tech at forster told me the die could only be opened up to .244 without causing problems so that is what I'm going with. I sort of figured .246 would be ideal so that's pretty close.
Danny
Danny