Too hard.
With apologies to Ted D., I found the Wolf primers are just too hard in the pistol format.
My G17 and my S&W M&P mostly ignited them, but some of the primers were just too hard to ignite and became a reliability issue for competition. Since the G17 and the M&P are not second strike triggers, that mean ejection of the round for another.
Also, for pure PPC revolver actions that are tuned for Federal SP primers, the Wolf primers would be a must to avoid. I guess it all comes down to the reliability and aggravation factor. Instead of 2 cents a for a Wolf primer, a Federal or Winchester SPP is 3.7 cents each....