Chalk this one up under Lessons learned.
I was zeroing an ,ahem, new GP 100 today and just couldnt seem to get good groups.
It frustrated me and sapped my confidence figured my recent eye surgery which moved my focal point out past the front sight post may have affected my shooting.
(my FSP is slightly blurry now in a darker room, outdoors its still fine, I see well up distance but for close now I need reading glasses)
Was shooting some low end ammo though magtech 38 spc.
Switched to Fiocchi 148gr JSP 357 Mag and the groups tightened right up.
Whew, 'twas the Ammo not me