check the carrier for a loose gas key. then check the rings on the bolt make sure there not bent or broke and properly staggered. check the fit of the bolt in the carrier--too tight or too lose are no-go.
i have been seeing a lot of faulty gas rings lately.
while testing the rifle make sure it is lubed up good.
a partially obstructed gas tube can also cause this problem as can a bent one.
you want to be sure the gas tube is straight and not clogged. you also want the gas port in the barrel clean.
i had a LMT 16" that had the same problem--it had a tiny speck of metal lodged in the gas port in the barrel.
last resort is pulling the front sight base off and drilling the gas port hole out one size larger. i only do this if i have tried ever other trick to get the rifle up and running.
one last little thing to check-- i have been seeing a few barrels that are a little tight on the chamber side. combine that with too much pressure on the extractor spring and sometimes a stiff 0-ring there can cause some weird cycling problems.
do you have any problems cycling rounds through the weapon by hand cycling the action? if it extracts rounds but takes too much effort. this can be the problem.
if it is real close to functioning with the wolf ammo --but runs fine on UMC or other USA made stuff. it might pay off to just carefully clean the rifle and lube it up. then run some hotter ammo out of it fire a few mags of the good stuff. then try the wolf again.