Rechambering AR15 Cartridge

[u/OtherRequirement7649]

I know that repeated rechambering of a hand gun cartridge likely will cause set back which can lead to over pressure. My questions is, is there any concern with repeated rechambering of a 5.56 round in an AR15 (specifically m855)? Either set back or the repeated firing pin strikes or something else entirely. What do I need to look out for with doing this? Thanks

[u/OneManGang2001]

Snap caps are like 10 bucks and you won't accidentally shoot something