Bullets for Vetterli (Black Powder Cartridge)
I is long time ago Iwas shooting the Vetterli.
I measured small caliber was 10.40 mm
Big caliber was 10.80 mm
Weight of bullet was 350 grain
The chamber of Vetterli is good so you are able to put ower sized bullet to brass.
If I remember right bullet diameter was 10.92 mm led with groves.
Loading was 37 grains SW #3.
It vas accurat 10 cm group/ 100 m
Only broblem was sights it is difficult adjust.
Broblem with old rifles are lading of the barrel.
I recomend to use paper patched bullet
Bullet diameter 10.40 mm + paper 2 round 0.1 mm