How many times can rod and main bolts be torqued?

I run carr s6 bolt's in my carillo rods, I measure stretch by inserting a stretch gauge in the head of the bolt that has a counter sunk hole for a ball end and at the thread end of the bolt it has a tapered counter sunk hole to insert the pointed end of the stretch gauge, my bolt's are stretched to .005-.006, carillo told me these bolts can be torqued at least a dozen times before I even need to start worrying about it, I check stretch every time and so far the stretch is always perfect. but at over 100 dollars a bolt they better last a while