I travel a lot for work, often times pmags make their way into my checked bag, only problem I had was when I connected through LGA and TSA did a random search of my bag, but because I wasnt getting my bag out of checked baggage all they did was page me, ask me why I had 10 mags in my bag, ask me not to do it again, and generally made me feel like a criminal for 5 minutes, then apologized for the hassle and I boarded my flight.
No magazines in carry on
http://www.tsa.gov/traveler-information/firearms-and-ammunition
"All firearms, ammunition and firearm parts, including firearm frames and receivers, are prohibited in carry-on baggage."
Let's say I fly to another state, on business, and while I'm there, I come across a deal on 30 rd PMAGS.
If I don't want the hairy-eyeball (and possible body cavity search) of bringing them home in a checked bag, can I ship them home?
You are releasing possession when you ship it. When you have it delivered to you in Md, you are taking posession of it again. I guess I read that as it is illegal. I dunno
Your issue was probably the fact that 30 round mags are banned in NY. I don't know why they would ask you not to do it again unless the TSA person didn't know what you can and can't check.
Let's say I fly to another state, on business, and while I'm there, I come across a deal on 30 rd PMAGS.
If I don't wthe shipping is not an issue nt the hairy-eyeball (and possible body cavity search) of bringing them home in a checked bag, can I ship them home?
I already "took possession" of them in [insert "free" state here]. So why can't ***I*** Fedex them to ***myself***?
It is a lot of work, risk and gray area when you can just drive over to VA, PA or DE and buy all you want legally and just bring them home, legally.
I would not risk the "You have been selected for additional screening," by TSA.