I have had this issue twice with my TAC 15
. The first time was one week before last year's archery season. I got it back from repair a couple of weeks later and wound up shooting a doe with it.
The second time was last Friday -- one day before the archery season here in PA. Sounds like I may have to wait up to three weeks before I get it back this time.
Probably had about 150-200 shots on it before the first failure. Probably another 100-150 until the next one.