480 Ruger load for 275gr Barnes copper DPX bullets?

[LarryL]

I've worked up a number of loads with the Gold Dot 275 and 325gr bullets.  I recently purchased 40 of the 275 gr Barnes DPX bullets, but do not have any load information.  I suppose I could break down and buy the $25 Barnes reloading manual, but I wondered if any of you have already tried some loads with this combination.

thanks!!