Aside from what I mentioned in a post to you offsite, the T92 HMG ammo on strippers is semi-rimmed. For firing in T99s MGs in 7.7, I turn down the rim slightly so it beomes rimless. This ammo is the same as standard rifle ball ammo and functions perfectly in the T99s.
Caveat: the cintage Jap 7.7 ammo is very corrosive but careful cleaning by immersion in boiling water with the addition of some ammonia cleans it up perfectly. Swab the bore and gas tube with the same water. Never have had an6 lroblems with the ammo if thwt is done. FWIW
Edited by Black River Militaria CII, 01 April 2019 - 07:22 PM.