06-25-2023, 09:13 PM
The deeper bolt face gives more room for the extractor and can contribute to longer extractor life. In my experience over gassed system and hot reloads are responsible for most 6.5 Grendel extractor/bolt failures. Im not sure the .136 bolt face depth affects the bolt integrity any more or less than the .125 bolt as long as pressures are kept to 52,000 psi or less. Having a square receiver where the bolt squarely aligned with the barrel extension can have an effect on bolt life. Having a bolt/BCG not square with the barrel/barrel extension is a recipe for more wear.