So I think a 9mm carbine is in the works. It'll probably be a RRA A4.  What ammo would you recommend or recommend I avoid?  I was looking at good buys on bulk ammo has anybody had any problems or praises for Mil-wal reloads, GA canned heat or any substantially cheaper others.

I'm definately not planning on shooting any steel or aluminum cased ammo, so wolf and surplus is out unless it's brass.

I use a lot of Winny White Box from Wally World.
It's like 12 bux a 100.

Mine gets 99% of the ammo I load myself.... no ammo to avoid problems here.

The majority of the ammo that people use when they want to use my 9mm, they typically provide USA9MMVP.

Okay. . . seems like nobody has any real issues with commercial 9mm ammo for a 9mm AR.  That's good. . . I'll probably mostly use WWB VP and S&B ammo. . .   I can get S&B in bulk for better prices than WWB.

i use the win white boxes from academy which is in foam trays and only $4.89 for 50rds which come out to around $10 for 100rds