I emailed Barnes regarding loads for the 275 gr XPB in the 480. They sent me only one load, using H110, only reaching 1350 fps. I am puzzled by this considering the standard factory load with a 325 gr bullet reaches 1350 fps, and Corbon quotes 1550 fps with the 275 gr XPB. I have emailed them back questioning the relatively tame load data, but have not received a reply.
Anyone out there more knowledgeable on reloading care to comment on these differences? I had considered working up a load for the 275gr XPB for hunting this fall, but if the only loading data isn't getting past 1350 fps, then I might as well stay with the Gold Dot 325 at that velocity, or the 275 gr Gold Dot up at 1550-1600 fps.
thanks in advance for any comments!