I have an NEF SURVIVOR 12ga and put 3 shotgun shells in the Storearm. They rattled to begin with too, so I wrapped each in a couple of cleaning patches and the rattle stopped!
It also gives me some more tinder material.
As to rimfires firing in the stock, that would take quite a beating! A rimfire needs a sharp, pinpoint hit to ignite, such as a firing pin. A broad force is unlikely to ignite the priming in the rim as it would be tough to dent the rim enough. Also, if one did go off in a stock, there would be nothing to contain the pressure, hence the stock wouldn't blow apart.
Ammunition going off in a fire is an interesting topic! The bullet is the heaviest component of a cartridge and therefore will be the last thing to move if a round is cooked off. A centerfire cartridge will blow the primer out to release the pressure. A rimfire will more than likely crack the case and allow the pressure to release, if anything flies it will be the case.
So said, I carry spare ammo in most of my stocks. With wood stocks, I drill a series of long holes under the buttplate and feed them in end to end like a TUBULAR MAGAZINE!

As to rimfires firing in the stock, that would take quite a beating! A rimfire needs a sharp, pinpoint hit to ignite, such as a firing pin. A broad force is unlikely to ignite the priming in the rim as it would be tough to dent the rim enough. Also, if one did go off in a stock, there would be nothing to contain the pressure, hence the stock wouldn't blow apart.
Ammunition going off in a fire is an interesting topic! The bullet is the heaviest component of a cartridge and therefore will be the last thing to move if a round is cooked off. A centerfire cartridge will blow the primer out to release the pressure. A rimfire will more than likely crack the case and allow the pressure to release, if anything flies it will be the case.
So said, I carry spare ammo in most of my stocks. With wood stocks, I drill a series of long holes under the buttplate and feed them in end to end like a TUBULAR MAGAZINE!
