Really like BLUE RIDGE BRASS!! I get all my forty cal (filthy due to the fact I have the assets and can easily clean it myself) scenarios from Blue Ridge Brass! I get it from the 4,000 at a time and have not had a 10mm situation during the bunch, https://40swoncefiredbrass65184.blogminds.com/how-reloading-40-s-w-can-save-you-time-stress-and-money-34207133