If you're open to broader suggestions...
1) Don't try to compete on cost - you'll never be a cheaper commodity-grade ammo supplier than any US manufacturer, let alone any of the Brazilian, Turkish, or Eastern European companies. You just can't out-walmart any company that has scale.
2) Niche hard. For many reasons, but first and foremost is to get a beachhead income stream with an audience of people who will become absolutely evangelical for your ammo. Find that audience, cater to it in a way that makes them exceedingly happy on quality or performance properties, and own that niche.
3) Don't dilute your quality or brand by chasing other things. Don't be General Motors offering all things to all people. Be Lamborghini.
4) Make building relationships and building tribe a key part of that niche work.
If you want a specific suggestion...
There may be a niche right here in being the absolute best manufacturer of high-performance, match-grade hunting .223 ammo on the planet. Other companies offer good loadings, but nobody focuses on providing the absolute best lineup of world-class .223 hunting ammo. Own that niche. It's wide open. Build the quality and provide the data, provide a handful of offerings meant to be the absolute best possible, iterate, and build a following by being dedicated and accessible.