Right...
But is this low-life d***head liable to have that or is he more likely to have normal, laying around ammo?
You are publicly calling your client a scumbag and low-life dickhead?
Just surrender your law license now.
You need to talk to a subject area expert.
Suggest you contact the NRA (National Rifle Association) to ask them for a referral to someone who would know who you should talk to.
btw,.223 ammo is considered less powerful than the military 5.56mm ammo. Some manufacturers of .223’s will warn against using 5.56mm ammo in a rifle chambered for .223.