You’ll need to set up a micrometer and use a telescoping gauge to transfer the inside diameter of the cylinder to the micrometer where you can actually measure it. An even better option is to use a ...

The .410 bore is a unique shotgun calibre that is commonly mistaken for a gauge. Although it doesn't have the same power as larger gauges, its lightweight design and ease of handling and versatility, ...

Regarding ammunition, Russians are reportedly focusing primarily on 12/89 Ultramagnum shotgun shells. The 12 gauge refers not ...