looking for mag pouches or a chest rig that will hold 5 or 10 round Aics mags for the 6.5 Creedmoor. What do you recommend?

Blue force Ten speeds you can hold anything in them.

I've got a Tyr tactical one that works well. Made specifically for them.

I've been looking as well. Tagged for suggestions.

Triad Tactical has several different pouch designs for "AI-like" mags, for example:  https://triadtactical.com/triad-convertible-magazine-pouch/

Triad also picked up the ball with their scope covers, ammo carriers, etc. when Eagle largely aborted their commercial market presence (and left all their resellers high and dry).

They also have a pretty decent padded sling design with a biathlon/backpack type carry setup that uses two of the padded slings.  I like that setup for stable carry of heavy precision rifles with side-mounted QD sockets.

I've used the Triad Tactical pouches for the 5 and 10 rounders. I've also used the HSGI Taco for the 10 rounders.