What Swiss service ammunition fits in what common straight-pull rifle?

Bloke takes a tour of the GP90 7.5×53.5mm, GP90/23 7.5×54.5mm and GP11 7.5×55, to see which of the common straight-pulls they fit in: models 1889, 96/11 and K31 are tested.

Earlier video on GP90 7.5×53.5, proving it’s smokeless: https://www.youtube.com/watch?v=l5VCbIfsmAQ

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