There are three answers to the question, IMO, since Wolf ammo comes in two different forms for centerfire rifles and is manufactured by lots of different sources, some of which are questionable. And, of course, Wolf makes .22LR ammo that is quite different and is made by just one source - SK Lapua.
1) For centerfire ammo, steel case Wolf is shootable and usually low cost but generally is not very accurate when compared with other factory ammo.
For .223, Wolf steel case makes my very accurate CZ 527 bolt action look bad with groups right around 2 inches - I'd classify it as junk in both 55 and 62 grain for a rifle that shoots both bullet weights under 0.5 inches on averages for hand loads and under 0.6 inches for good factory ammo.
For a Colt HBAR .223 with a 1:7 twist barrel, Wolf Steel case shot both 55 and 75 grain ammo 2.4 inches and 2.5 inches respectively on average at 100 yards. That HBAR will shoot under 1 MOA for 77 grain ammo it likes and averages just over 1 MOA for 75 to 77 grain factory ammo.
2) For centerfire ammo, Wolf Gold with brass cases sometimes shoots better than the Wolf steel case, but it depends upon the caliber and the source of the ammo that Wolf contracts for since they don't make their own.
For .22-250, Wolf Gold 55 grain soft point (brass cases) shoots 1.3 inches in a rifle that shoots under 0.7 inches for hand loads all day long. I expected better from the higher priced Wolf Gold brass case ammo.
For .308, Wolf Gold FMJ 150 grain ammo shot reasonably well in my Savage 10 FP (averaging .95 inches at 100 yards) in a rifle that averages 0.76 for 150 grain ammo. That isn't too bad for the brass case ammo. The Brass Case shot even better in my buddy's Savage 10 FP (averaging 0.75 at 100 yards) which was 0.2 inches better than any other factory 150 grain ammo in his rifle. Both rifles are very partial to 168 grain ammo and both average under 0.6 for hundreds of groups.
In the Colt HBAR .223 Wolf Gold 75 grain shoots 0.5 inches better than Wolf Steel case ammo at 1.9 inches but that is still almost double what good factory ammo shoots in that rifle.
3) The big exception is the 22LR Wolf Match Target and Match extra ammo that is manufactured at the SK Jard factory in Germany. That is great match ammo and shoots as good as anything in 7 rifles (3 bolt actions and 4 10-22 rifles that have been extensively tuned). We have shot over 500 measured groups with and about 50 groups in my Ruger Mark II Competition pistol. At least one of the two ammos is in the top two favorite ammos for all 7 rifles and Match Traget is in the top three for all 7. Match Target also has gotten rave reviews from anyone at our range who has shot it alongside any other ammo. There are a few ammos that shoot almost as well in a particular rifle and one or two that shoot better in some rifles, but for the cost, the Wolf 22LR ammo is probably the best buy around for match ammo.