There isn't much recent information I can find about the "New" Expansion Industries primer manufacturing facility at the old Red River Army plant. One item I found dated in July 2022 mentioned that primer production won't begin until AT LEAST early 2023. And potentially that could mean never. There was another comment from around the same date reporting that there seems to be no evidence of activity going on at the location.
I wouldn't count on any primer supply relief from that source until it happens. I feel the same way about Ammo Inc. until someone convinces me otherwise.
I also read some items about Palmetto State Armory setting up a large ammunition manufacturing plant. This is all I know:
What's Up With Palmetto State Armory And AAC Ammo? | Ronin's Grips