POI Shifts/Mostly Rambling

[Psywar1-0]

I just got my 700 PSS back from Gemtech where they installed overbarrel Bi-lock. I had planned on going to Quantico and re-zeroing at 100yds with 118LR and then shooting groups with M852, 118SB and M80 Ball to capture POI Shift.

Due to bad weather Quantico was shut down on Sat so I had to use a 25 yard range. Knowing that I probably would not get any good dope at only 25 I went ahead and shot just to get out of the house.

I zeroed at 25 using a conventional crosshair zero target then went on to shoot the different ammo types on Shoot NC targets that I can stick in my data book. The groups were as follows:

118LR- .9in group, horizontal string
118SB- .8in group
M852- .5in group
M80- .6iin group

The results were not what I expected, with the "Lesser" types of ammo shooting better groups than the high end ammo.

All ammo was real milspec ammo, not any of that XMPD seconds that is on the streets.

The long and the short of all this is

a. Do I need to research the lot numbers of the 118LR and see if there are issues with it

b. Was I over compensating for the lesser ammo and just shooting better due to applying the principles of marksmanship, or was the gun just warmed up and happy?

Im hopefully going to Quantico again this Sat to get a good 100yd zero, and shooting in a F Class match there on Sunday.