Guys I just want to know what bulet weights Holland and Holland originally designed for this cartrige? What or were the original bullet weights? Can someone confirm fact?
Many thanks

From a late 1930's reference --

Rimless: 150gr bullet and 58gr Cordite at 3,000fps, 180gr bullet and 55gr Cordite at 2,700fps, 220gr bullet and 49gr Cordite at 2,350fps

Flanged: 150gr bullet and 55gr Cordite at 2,875fps, 180gr bullet and 50gr Cordite at 2,575fps, 220gr bullet and 46gr Cordite at 2,250fps


Winchester cartridges (rimless) listed at the same time were --

180gr at 3,060fps and 220gr at 2,730fps

Thanks Grenadier.