I recently purchased some Wolf 75g match ammo in .223 funny thing is, in my 20-inch bull-barreled AR, they won't cycle. They cycle the bolt enough to eject, but not enough to strip and load the next round. Same gun, same mag, cycles 55g rounds like nobodys business, but will not cycle the 75's. Is a spring change necessary? Please keep the Wolf bashing elsewhere. If there is an issue specific to this Wolf ammo, chime in. But no "Wolf sucks" nonsense, please.