Which Berger or Bergers and what impact velocity?
I have a 7mm STW and also had issues with Berger 180 hunting vld.
My STW shoots Hammer 143 Hunters or 145 HHT into one hole if I can aim and manage recoil well enough. Those bullets have killed a bunch of animals for me and fly very very well at distance. Same STW shoots Berger 195 quite well but lower stability due to a traditional 9 twist barrel.
With a 7 PRC twisted optimally for heavier bullets you could probably step up a hammer weight class. Best performance is with a very well stabilized bullet.
ABLR are very picky, so I would try other bullets and powders.
Hammers are an excellent blend of mono and faster expansion bullets in my experience. Just keep your impact velocity appropriately high and stabilization high.
If going Eld x/m, Berger, ablr, TMK keep your impact velocity appropriate ( usually too fast for closer shots)