Jammed Bolt after shot

[honczek]

Hi i found old kar98 during cleaning my gradfather's house with some old ammo. It Is not in the best condition, but i cleaned it as much as i can and tried to fire a shot. IT fired perfectly, but the bolt remained jammed and i had to open it with the rubber hammer. I though that it was caused by he bad cartridge, so i cleaned it, try another and it happened again. There Are two types od cartridges, that i have, one Is obviously from Machine gun belt and second are originals for rifle....

 

[DaveDavis]

There may be set back issues w/ the bolt having to much headspace.
Do this buy some commercial grade 8mm ammo and try it.
Older mil surplus can actually be dangerous

 

[moconfed]

What does the spent brass look like?

 

[Jakeman664]

Let's see the rifle too. I hope you weren't very agressive in your "cleaning"

 

[R.W. Parker]

Primary extraction issue. How's the chamber look? Peer in there with a penlight and have a look, it should be bright and smooth.