Most pins in most gun brands from old to modern have slightly tapered pins and drive out of the gun from the left to the right (looking down the gun from butt to muzzle as if you were firing it)...and therefore drive back in from right to left...be careful. Its a good habit to follow this method, even if the pins aren't tapered.
Also, if it is an older weapon, with hard to find parts, you can add to the metal by adding a little weld or pein hammering the part to stretch the metal...and then filing it back down to tolerance. Does that make sense?
I hope you are getting that bolt apart.
Regards,
Patrick