All of the Browning and Winchester/USRA rifles chambered for all 3 WSSM cartridges were cataloged with 1-10" ROT barrels.
Thanks for that - will assume that guy would have been using such a barrel/ROT. Looks like that cartridge factory load used a 55 gr. bullet - have not checked, but probably optimum for that load and ROT. When I go up around 69 or 70gr. with the .223 bullet, the ROT seems to become much more critical and the tolerance slimmer. Thanks again.
