Come on guys, this is 100yrds... most of us than throw rocks into a 4" group at that range.
I'd bet that if you really focused on the fundamentals .. breathing, sight picture, positioning and setting yourself up behind the rifle correctly in addition to good trigger control (read Ed's recent post about that), and you can pull those groups down to sub 2 MOA at 100yrds.
Wolf ain't great, but it isn't like it's someone home grown BS hand loads. Yes, if you get a higher quality ammo, you can do much better.
Post a picture of the target, that will tell for sure if we're looking at some shooter issues or ammo issues.