If it's happening on both guitars, then I'd look for changes in your playing style. Unless all the strings (on both guitars) are about the same age, in which case they might just all be failing together from all the stress you put them through. :-)
I recently changed all the strings on both guitars, hoping that'd buy me a reprieve from the breakage. No such luck. I don't think I've changed my playing style/habits in the past several months -- the last big change I can think of would've been when I first started getting acrylic put on three of my nails. When I did that, all of a sudden I could hit the strings a whole lot harder -- louder, more stressfull on the muscles along my metacarpals, and yeah, harder on the strings. But that was a while ago, longer ago than the recent rash of broken strings.
Maybe I'm just noticing it more because I had gigs every weekend in May, a little busier than usual, but even so, a broken string every time I play with HCB (http://www.homespunceilidh.com) is an increase even on a per-gig basis.
(I do hit pretty hard, I know. I was pretty loud on just my natural nails; with the acrylic I frequently feel one of the top three strings jump far enough to slap the palm of my left hand on a violent strum. Which is always a nervous-making feeling right after I've replaced a string. Someday I need to sit down in a good room with a good microphone and figure out at what point I stop getting louder and just change the sound. I think I'm already spending part of my time in that range. Someday I should also replace my pickguard...)
broken strings
Re: broken strings
Maybe I'm just noticing it more because I had gigs every weekend in May, a little busier than usual, but even so, a broken string every time I play with HCB (http://www.homespunceilidh.com) is an increase even on a per-gig basis.
(I do hit pretty hard, I know. I was pretty loud on just my natural nails; with the acrylic I frequently feel one of the top three strings jump far enough to slap the palm of my left hand on a violent strum. Which is always a nervous-making feeling right after I've replaced a string. Someday I need to sit down in a good room with a good microphone and figure out at what point I stop getting louder and just change the sound. I think I'm already spending part of my time in that range. Someday I should also replace my pickguard...)