something the lee speed experts have to answer. new kynoch ammo is 2 mm to long to fit into the magazin of my Mannlicher so I must handload. Kynoch told me that they use the common oal for this round from old times but there must have been also a special load for Mannlicher rifles then.
because the 375 flanged have the same basic diameter as the 303 service cartridge I understand that it works into the magazin without problems.