Earlier today I was asked to explain (in laymans terms) what calibres are and there MAIN uses.
So here is my attempt.
I am aware they are not all there and neither are all bullet weights this is just a guide for novices and anyone with an interest.
So I thought it may have some use here as well.
Regards John.
With some calibres they are .000 this is point of an inch bore size
Metric is 000mm which is easier to understand.
Anyway here goes, calibre followed by main target species, followed by bullet weights in grains(COMMON HUNTING WEIGHTS)
.17 HMR...... SMALL GAME.17-20GR
.22 LR.....