The SAAMI pressure was relevant at the time to AR based gas guns of which the round was designed for. Also the SAAMI chamber has a stepped throat to lessen the pressure spikes, there is plenty of info about this on the aforementioned website. There are varying chamber designs now being used by firearms manufacturers and it would be interesting to know which design Howa are using.
I have found the Grendel to be the more touchy of all my rifles in regards to pressure when load developing.
Between starting this post and finishing my coffee, Greg has reported similar comments![]()
Bookmarks