opinions on bolt preference

[Variable]

My AA regular bolt is going strong after 5 years of use, and I shoot in volume. Most of my range sessions involve ~100rounds, some more, some less.

Same here. I've got thousands of rounds down range since I started, and my original AA bolts have never quit or been a problem in any way.

I originally didn't comment, because I've never used anything else.

The only thing I've ever been able to break on a Grendel is one extractor. It was in my 10.5" and had been used full auto, suppressed, and absolutely filthy for a very long time. I have a pack of spare extractors, and keep a spare bolt in the grip anyway. I expected to break more by now but never did. I'm quite happy with AA. I did grab some "Hard Use" bolts to throw with the regular ones in the spare parts pile, but still haven't needed them.

If somebody makes somethng better than the AA bolt, I've never had the need to find out.LOL