No I am not aware of all the broken Grendel bolts. You have to help me out... I entered "bolt failure" at the 65grendel.com forum and didn't get any relevant threads. What search words should I use to read up on all the broken Grendel bolts?
And are you saying the max load for A2520 is dangerous? The AA chart doesn't list a pressure for the load. Can you tell me what the max pressure is for 6.5 Grendel and what the pressure is for the A2520 load?
Something tells me you won't get a coherent answer. Likely some hearsay passed down as the Gospel truth (you know, from his cousin's girlfriend's sister's husband...) There are bolt failures, but I don't think it's any higher than the normal 5.56/.223 chambering.
More than likely any perceived increase for bolt failures in 6.5G is hot-rodded handloads, or due to out of spec bolts being used. Like someone grabbing a 7.62x39 bolt and using it instead. Bill Alexander has made subtle changes in the bolts he sells from the run of the mill stuff that's out there.
Personally running a non-AA bolt wouldn't scare me, but if I was using one for 3-gun I'd stick to AA bolts only, and not get crazy with pushing the envelope on hot loaded ammunition.
Well, me and my cousin's girlfriend's sister's husband did our own research in lieu of taking other people's word for it, using pressure testing equipment that I own when developing the 30 Major, along with speaking directly with Bill Alexander. One of the changes he made to the Grendel bolt was he made it deeper than a x39 bolt..023" deeper IIRC. Feel free to check my numbers. This keeps people from swapping a x39 bolt in the place of the Grendel bolt, so they don't interchange. Other than that, your post seems to support mine. Thanks. --Mike Ezell