The big link that is making the rounds is this page, which has case after case of greater female violence:
Analyzing responses to the Conflict Tactic Scale and using a data set somewhat different from the previous 2000 publication, the author reports that women are more likely than men to throw something at their partners, as well as slap, kick, bite, punch and hit with an object. Men were more likely than women to strangle, choke, or beat up their partners.
A review article which suggests that "women's empowerment is associated with lower victimization rates from their partners." Greater individualism and empowerment by women, however, are also associated with higher perpetration rates.
Twenty three dating couples completed the Conflict Tactics scale. Results indicate that women were significantly more likely than their male partners to express physical violence. (UK)
Used Conflict Tactics Scale with a sample of 270 undergraduates <95 men, 175 women> and found 30% of men and 49% of women reported using some form of aggression in their dating histories with a greater percentage of women engaging in severe physical aggression.
A modified version of Conflict Tactics Scale was administered on two occasions, 6 months apart, to 526 adolescents, <280 girls, 246 boys> whose median age was 13. Results reveal that 28% of girls reported perpetrating violence with their partners <17% moderate, 11% severe> on occasion one, while 42% of girls reported perpetrating violence <25% moderate, 17% severe> on occasion two. For boys, 11% reported perpetrating violence <6% moderate, 5% severe> on occasion one, while 21% reported perpetrating violence <6% moderate, 15% severe> on occasion two. In terms of victimization, 33% of girls, and 38% of boys reported being victims of partner aggression on occasion one and 47% of girls and 49% of boys reported victimization on occasion two.
...and that's just the A's of the bibliography. Astounding.
I came across all this outside of the manosphere in Yahoo Answers (by way of a Google search). There are offended females, of course, dropping links of their own.
The first link says: 85% of domestic violence victims are women. The rest of the stats on this and almost all the other pages are non-objective, saying things like 1.3 million women are victims of assault each year. Sentences like these do not address the ratio we are discussing. The second link says 95% of all domestic abuse is to women.
So what's going on here? Studies are showing that women may become more violent within relationships, but are more often victims of domestic violence. Much of that, I would say, is in the fact that men won't report being beaten up by a woman, ever. It is an incredibly emasculating action, even moreso than the actual abuse. Violence toward men is severely underreported and downplayed, by the abused men themselves.
But is that enough to cover the discrepancy?
Another question: even if it doesn't cover the discrepancy, why does a larger incidence in violent behavior in women in relationships in general, as seen through the down-in-the-weeds studies on the first link, not correlate to larger ratio of male victimization?