Hello
Thanks for your answers.
I tried my 4.1gn load to day, V0= 738 fps
I shoot this group standing on my knees, holding with both hands
and using a rifle rest to support the gun. Distance 27 yards. Remember, it´s a stock Mil-Spec.
The line is brooken between the 9 & 10, so three 10´s. :-)
The group is 2.6" C-C, seems that the group gets smaller with speed.
No pressure signs, a little more recoil. Might bump it up to 4.2gn or 4.3gn.