Berger 55gn HPBT for .204 Ruger

I'm trying to find load data for 20 cal 55gn Bergers. Anyone have a fist twist .204 that has developed a load for these. My varmint AR (24" 1:9" Shilen barrel) shoots the 50gn Bergers great and I want to see if it will handle the longer pills. Greenhill formula says "no" but you never know. Anyway, it's hard to find out if you can't find load data and I don't feel like guessing and finding out the hard way that I'm either too heavy or too light on the powder charge.

Try the forum at 204Ruger.com - lots of good reloading info there.