I was told that the Express has been milled to a more uniform granule size, and polished, whatever that means, so that you get a more uniform burning rate, and lower SDV. I can see BPCR shooters buying it to use in the big rifles to shoot those targets out at 500 yds., but I can't see most ML shooters needing that kind of consistency. They can't hold the gun close enough using iron sights and an off-hand stance( Me either-so don't get your shorts in a knot!) The BPCR folks use cross sticks to shoot their guns at those long range targets, and tang peep sights, with globe front sights. They are shooting carefully weighted and lubed cast bullets, not PRB, in very heavy barrels. YOu won't find too many of us walking around with a rifle that weight more than 12 lbs.! I am happy that Goex found it worth their while to bring out cartridge grade and now Express Grade BP. It means that the company is making a profit from sales, in spite of all the subs and those unmentionable guns being sold in direct competition.