Probably not. If this is the Browning Long I am thinking of you would be better served with .38 Super ACP dies (NOT data). The browning has straight, untapered sides while the Luger has a distinct taper to it. You might be able to cobble something together with Luger dies that would shoot, but I don't think the cases would last too long. Look the round up in Cartridges of the World or Wikipedia and see if it is not close to the untapered .38 auto rounds. .38 ACP is semi rimmed and headspaces on this rim, tho tiny. I think there is some limited surplus ammo available. Un reloadable cases (Berdan) but cheap. SAMCO maybe SAMCO global Arms. google them. Luck.