Unknown (some to an extent) ammo

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Got some ammo in a bulk bag of 8mm mauser but some seem off. Also got a lone round just trying to identify firearm, and one on stripper clip, i was told was 7.7 but stripper does not fit in my type 99 and ammo fits in gun but bolt will not ride forward all the way.
The pic of the ammo in the line (from left to right) No name stripper clip ammo, the 7.62 that I have no idea what it goes to, 7.92 for my 8mm mauser, the 1938 nazi stamp, 8mm U.m.c. stamp, one that says FNP 7.92-952, and mosin 7.62 x54r (for size comparison)

Don't know all but I recognize a few. The 1938 nazi headstamp is for the model 95 Styer straight pull and is an 8mm. The UMC 8mm should be a Mauser round made by Remington. The round nose looks like a 30.30 Winchester. That's all I have.

F N P ~ Fábrica Nacional de Palencia, Spain
M ~ Ammunitionsfabriken Marieberg, Stockholm, Sweden
M Birmingham Metals & Munitions Co./Nobel, Birmingham, UK
M Milwaukee Ordnance Plant, Milwaukee, WI, USA (1942-1943)
M Munizioni e Cartucce Martignoni, Genoa, ItaLY