First Build Questions: B14/Bravo - Mags, Bipod?

I would avoid the magpul bipod. I have a few of them on AR’s and they’re okay for a lighter non-precision platform like an AR-15, but I would not use them on a heavier more precision-minded build.

Atlas, MDT, Accu-Tac, TBAC is where I would be looking. Atlas being the best bang for buck.

MDT makes great AICS mags, as well as Accurate mags.
Really the Magpul P-mags work great for what they are, if on more of a budget.

That receiver is not cut/notched for anything longer than SAAMI, therefore, there's no need for anything fancy. I'd expect good funtion out of any of the following AICS magazines: Magpul, MDT Polymer, Amend 2. I'm sure there's more. I'd actively stay away from anything "Binderless" or anything that advertises you can load long COAL rounds - your receiver can't accept them.

I used the magpul bipod for a bit - the fast deploy is neat, but it "bounces" under recoil and when on uneven terrain, so I moved on shortly afterwards. I prefer adding an ARCA rail and using an Accu-Tac, tons of folks enjoy the Atlas CAL, the TBAC is popular now, and since you mentioned hunting, the MDT SkyePod has some unique capabilities that come along with a premium price tag.

For off-the-shelf ammo, check out Berger factory ammo. I've had fantastic luck with the 130, 140, and 153.5 grain offerings in factory rifles.

For other things to focus on: fastener torque. Some overwhelming percentage of issues with budget rifles is probably fasteners that were never torqued, or that backed off somehow. Pull the action screws, optic base, and scope rings, degrease all the threads, and then re-torque everything down to OEM recommendations and give yourself some witness marks that you can inspect before each range trip.