Checking Ammo in my Finnish M39 Mosin for Finnish Brutality

Cool Forgotten Weapons merch! Finnish Brutality 2021 is going to be a tough match in the best case. But I will be running it in a 1940 uniform, with a Mosin. A Finnish M39 Mosin, sure, but still a Mosin. That means that I have a lot of things already working against me, and the last thing I want is to have the rifle not shooting to point of aim on top of ever