Lost please help
I'm new to reloading, I have been working up various ladder tests using berger vld bullets out of my 1903 a3 custom. I have noticed that during the ladder tests that I would get drops in velocities for three or four rounds, even with .4 grain increases in powder charge. Anyone every see this in there test load work ups. What is causing this. I thought that I might have found some accuracy nodes at 51.8, 52.2, 53.0, and 54.0. So I loaded up some 4 shot group tests at these charges. Boy was I wrong it shot all over the place at 200 yards. Tightest group was around 3moa! the velocities started out high and steadily dropped off during each string. Some times as much as 80 fps.
Nosler 30.06 springfield brass
Winchester LRM primers
Berger 210gr target vlds
using 51.8 to 54.0 grains of H4350
Seat bullets .07 into the lands at 3.363 oval with horday oal gauge