Midway has 5mm ammo again from Aguila it shoots great in my 592. I bought some from Angela's before but it is pricey. Good luck and congrats on the two rifles, the is a whole forum dedicated to the 5mm you can find parts on there as well.
appreciate the good info fellas, I tried Trekker, they're out of stock right now, figured some folks on here would know more about the 5mm Rem than me, thanks and I'm gonna try your suggestions.
I have some fresh from seller. It's not cheep though. It runs $27.00/50. Price could be less. It would be based on quantity.
AGUILA AMMO 5MM REMINGTON MAGNUM 30GR. SJHP 50-PACK
FEATURES
-Caliber: 5mm Remington Magnum
-Jacketed Hollow Point
-30 Grain
-Velocity: 2300 FPS
-50/box