That's not a Barnes bullet, at least not a modern one. The only 275 grain bullet made by Barnes is the 54/50cal Expander MZ, which is a 50 caliber all copper bullet with a large and very deep hollow point, which the bullet shown clearly isn't. Barnes currently offers no .44cal (.430") bullets in 275 grains, either in the all-copper or the Barnes Original lead core HP.
Mike