Undergassed - Spikes Tactical Lothar Walther 10in Cold Hammer Forged Barrel

I have this attached to a superlative arms adjustable gas block. I've gone through the full range of gas settings and I've had one actual case where the casing ejected. I've put about 75 rounds through it and I've got almost nothing but failures to eject. The BCG is a bravo company and everything is lubricated well. It is very disappointing as the barrel took me a long time to save for...then a long time to get...and it was expensive. I'll be replacing the buffer with a lighter weight buffer and installing a Tubbs spring made for 300BO as well as replacing my bolt carrier with a low mass carrier. Outside of that there isn't much I can do without taking the barrel to a machine shop and resizing the gas hole.