Well I had a crack at it today at 800M and decided with the legs forward like they are it was like trying to shoot in the Hawkins position way too low so I put the legs vertical and went from there as expected the pivot worked loose but it is no real big issue I just shot to a group to check repeatability and it went well having a reasonable group.
My loads are getting up a bit 42gns AR 2206H with 168gn Hornady A max will be going off a bench next week end at 1000yds that is when I reckon having the feet forward will work keeping it low some have suggested I will get bounce with them forward so we will see, after that I intend on doing some 100 - 200 yd work and report back as I know this rifle is good for .3 moa from a Farley rest at 100yds,.
So at this stage I am quietly confident this bi-pod will go the distance, this one also has Atlas on it.