I thought maybe OP meant Old Person.
Yes I am using a hornady modified brass. I am actually measuring OAL with a ogive compairer .
I have several test load made up and will give them a go next week.
I was surprised at the group size, knowing that I would have to work up to an accurate load, I can't fault the barrel, the accuracy is great. With my 1 in 9 savage heavy it shot 3/4 moa out of the box, then worked down from there. The 223 remington savage seems more forgiving than the Criterion barrel. I am hoping, and I will work for a one moa at 500 yards consistanly. The savage would do that at 300 yards but reaching out to 500 600 yards with the 68 grain was just far.