they usually break between 1 month and 1 year, depending of the player. Mines are not lasting that long but as you said it might be normal due to weather and frequence of play and has nothing to do with material or movement. So I guess i have to deal with it, that's costly tho and I'll try the few things that might help, mentionned before.
For good intermediate standard players who are offensive 15-20hours is totally normal for bg65. Especially if you are reg playing decent games of level doubles. Your strings are fraying in the sweet spot so nothing untoward is happening with regard to faults, stringer or mishits. You are just using the life of the string.
The county and uni singles players I string for use 27lb and average 2-3 weeks per restring playing 20 hours a week.
I have the exact same problem on my NR Z-Speed, BG65@27 used to last only around 20 hours and always a cross string at the centre of the frame. Switched to BG65ti and found they have a bit more life
If there is no other sign of wear on the string and it is the cross every time that could be down to the stringer. Going through the shared hole or the covered holes near the upper middle can cause the string to coil/twist. if the tension is pulled without sorting this, then the string is considerably weaker.(65ti twists less because it has harder feel, so it might point to that fact even more)
It is the same string every single time, and surprisingly there isn't any fraying in the strings, they just seems to sort of cut and eat into each other and eventually break
It is the same string every single time, and surprisingly there isn't any fraying in the strings, they just seems to sort of cut and eat into each other and eventually break