Decided to zero a Sig Romeo 1 optic as perfect as I could today and was going bananas.
I read somewhere on Sig's website the iron sights of all Sig hanguns come out of the factory zeroed to 25 yards. So I slaved the red dot to the iron sight just to start. I measured out 25 yards, set up a bench rest in the prone position. Shots were all over the place. I assumed it was either me or the ammunition. Being set into a rest I didn't think it was me. I switched from AE 115 FMJ to Speed Gold Dot 124 TMJ and got the same result. I moved the target to 20 yards and was able to group, with the rest, within a tiny fraction of each other. The group was slightly left of target so I adjusted the red dot. 5 shots as spot on as if I went up to it and poked it with a pencil.
Moved the target back out to 25 yards and I'm all over the place again. Groupings at 25 yards are 8 - 10 inches apart and nothing resembling a pattern. After an hour I put the target back to 20 yards and pinpointed the center again and called it a day. So I'm zeroed at 20 yards with irons and the red dot but 25 yards I have no idea. Free handed 5, 10, and 15 yards and was accurate so I was happy but am baffled why 25 yards is such a problem.
How can I be so far off just 5 yards further out with a solid bench rest? Ammo inconsistency?
I read somewhere on Sig's website the iron sights of all Sig hanguns come out of the factory zeroed to 25 yards. So I slaved the red dot to the iron sight just to start. I measured out 25 yards, set up a bench rest in the prone position. Shots were all over the place. I assumed it was either me or the ammunition. Being set into a rest I didn't think it was me. I switched from AE 115 FMJ to Speed Gold Dot 124 TMJ and got the same result. I moved the target to 20 yards and was able to group, with the rest, within a tiny fraction of each other. The group was slightly left of target so I adjusted the red dot. 5 shots as spot on as if I went up to it and poked it with a pencil.
Moved the target back out to 25 yards and I'm all over the place again. Groupings at 25 yards are 8 - 10 inches apart and nothing resembling a pattern. After an hour I put the target back to 20 yards and pinpointed the center again and called it a day. So I'm zeroed at 20 yards with irons and the red dot but 25 yards I have no idea. Free handed 5, 10, and 15 yards and was accurate so I was happy but am baffled why 25 yards is such a problem.
How can I be so far off just 5 yards further out with a solid bench rest? Ammo inconsistency?