GSO wrote:Randy,
Did you zero at 50 yards and use the 100-yard holdover mark?
I'm hoping to take mine out today with a rifle I just built and haven't test fired yet... Also need to test fire some RTBA 150 grain JSP that I got a few weeks ago. More unknowns than I would like, but it is what it is. My wife also wants to shoot her new 9mm Shield again, but looks like we may have lightning. I don't mind the rain, but lightning and rifles don't seem like a good idea to me. I'm anxious to see if the ranging marks work at 100, 200 and 300 yards for supersonic ammo that I'll use for hog hunting.
Thanks,
Greg
Ok, I went to the range again today. Three days in a row. Lots of trigger time this week. I wanted to re-zero at 50 yrds and use the first holdover mark as GSO suggested for 100 yrds interpolate between the first holdover and the "3" line for 200 yrds and try the "3" line for 300 yrds. This is what the manual says on page 8:
"Starting with the center of the reticle, the initial ballistic hold is 50 yards on center. 100 yards is the first cross below center. Thereafter, each holdover is indicated by the numbers "3" through "7". 200 yards is approximately half the distance between the 100 and the 300 yard holdover"
Let me say this is completely wrong. After a lot of frustration on the range, (see results below), I called Richard at PFI and he confirmed to me the manual is wrong. He said it was written by multiple people and he may have to edit that page. I should have known by just looking at the first line down below center cross is way to much holdover for a 100 yrd shot with a zero at 50 yrds. The impact point for 50 yrds and 100 yrds is almost the same, you don't need a holdover for 100yrds. He told me the first line down below center cross is in fact the holdover for 200 yrds and halfway between the first line and the "3" line is 250 yrds. He recommended zeroing the scope at longer ranges first using the appropriate hold line and then work back to shorter distances. So it looks like I need to go back to the drawing board once again with this scope and re-zero it at 200 or 300 yards and see how it hits at 100 and 50 yrds.
This is my 50 yrd zero group using 125 gr SMK, 2221 FPS.
100 yrd group using first holdover line below center cross. (about 4 inch high):
200 yrds using half way between first line and "3" line. (like the manual says to do) only 1 shot hit tgt. rest were off tgt high.