Loki is 3.50" ID. AMW had a 3.55" ID case .
Loki were considered "standard" cases. 3-1/2"
Loki stopped 98 cases (pre Scott K.) Some were made w/ threaded ends, most snap ring and used no external thrust ring. They were about .020" or so OOR.
AMW 98 3.55 are specified drawn cases. About .002"-.005" OOR. The nozzle and closure liner shoulders are same OD as Loki. Hence, AMW 98 took thicker liners.
From what i knew 2-3yrs ago, AMW cases sold are either old stock or used. Any Loki 98 are used.
Trucore 98 cases were non anodized standard 3.50 cases had both machined shoulder thrust and external ring. About .005" OOR.
Good luck.