Well, I sort of got out to 600yd this last weekend. Weather and schedule finally cooperated enough to at least try.
Gong painted and 8oz water bottle set up at 300m in case I needed to come shorter to zero. -Didn't need them.
Gong painted and 8oz water bottle set up at "400m".
Lower left corner was a zeroing strike. Adjustments made resulted in the other three hits. Oversize splash nearest center is two hits.
Water bottle was the final shot I took at "400m". It was semi-solid icewater. It exploded nicely the first shot I took at it.
For size reference, the GPS is 6.25" tall, 2.25" wide, and the display is about 2.25" tall and 1.5" wide.
From the bench I used, the "400m" gong measured in at an actual 385m distance. (420 yards)
Gong painted at 500m. First strike for zeroing was the bottom center one. Couldn't see it behind some shrubs between it and me but I heard the strike. I made an adjustment up on the scope, and aimed higher for the center of the top 1/3 of the gong. Top center was the next strike. Top right was shot #2 -a flier (I pulled it slightly). Then #3 was on the first and then I went after an empty gatorade bottle on the rail and missed. I returned to this gong and made another shot offset LEFT of the middle mark trying to get the same distance left as the miss right. I ended up a couple inches closer than I expected. I made the adjustment on the gatorade bottle and knocked it off the rail.
Measurement to the 500m gong right on the money.
501 meters = 548yards
A little more normal exposure with flash giving a better idea of the fading daylight.
Overexposed showing all five strikes.
The empty gatorade bottle with a huge hole. I had leaned a broken 3/4 clay in front of it to make it easier to see. I had to pick up the gatorade bottle and stand it back on the rail but these pieces of the clay were still on top of the rail. In the background partially covering the #13 lane sign is my 600y target.
502m
Best picture of the hole. To see the back bottom edge of the bottle and the raised center, you're looking through the hole.
Just after 5pm local 12/19/10
Winds almost calm. Temp 32F
Farthest target set. Used my target stands built for this purpose.
Target stands.
Behind them is the range competition "pits".
You can see part of the counterbalanced target frames that can be lifted on tracks.
547meters
598 yards
Light was fading and I was guessing at the scope setting. I couldn't see the hits at that distance on paper via the spotting scope so I just ran a dozen fairly rapid fire shots to get an average. I was aiming at the 1" red square (largest square) nearest the center of the entire target board. Smaller squares are 1cm, circle diameters from inside to outside are:
1cm, 1in, 2in, 4in, 8in, 12in. Radius measurements are marked on the larger circles 2", 4", 6".
Closer zoom.
I was aiming at the 1" red square (largest square) nearest the center of the entire target board. Smaller squares are 1cm, circle diameters from inside to outside are:
1cm, 1in, 2in, 4in, 8in, 12in. Radius measurements are marked on the larger circles 2", 4", 6".
Indoors better light and outer edge circled with green highlighter.
547meters
598 yards
Semi rapid fire in fading light.
Indoors better light and outer edge circled with green highlighter.
547meters
598 yards
Semi rapid fire in fading light.
547meters
598 yards
Semi rapid fire in fading light.
547meters
598 yards
Semi rapid fire in fading light.
Remington 700 VSF .308 Winchester
Handloads my lot# 101030ADh168amax445V
4 shot Chrony:
2583 Low
2610 High
2597
2594
(2596 avg)
Not near perfect, but I couldn't see the strikes on paper with the spotting scope at that distance in that light. Fingers cold and frankly, ready to go. So I basically quickly threw lead to finish off the lot. I also wanted the brass empty for my shoulder bump revision for the next and future lots.
Scope reticle travel adjustment information:
Three number coordinate system. First digit is the turn #. Each turn is 6moa, each moa is divided into 8 clicks.
What I call "bottom" of travel on the scope is
0-0-5
Top is
7-0-5
(336 clicks total = 42moa)
4-0-6
385m (verified photos above)
4-5-4
500m (verified photos above)
5-2-2 (estimated semi-verified)
547m (598y)
6-5-3 (10 clicks travel remain)
709m / 775y (paper calculation / not verified)
using 15moa drop reticle,
6-5-5 (8 clicks travel remain)
914m / 1000y (paper calc non-verified)
--15moa drop reticle is the one on the ranging baseline for my reticle -second from bottom-- scroll back up to see reference photo in previous post on this thread ^^ above ^^
using 20moa drop reticle, (bottom most provided)
6-0-5
914m / 1000y (paper calc non-verified)
Which leaves 48 clicks of (potential) adjustment
48/8 = 6 more MOA adjustment
1000y should be into transonic for this load and it starts losing accuracy as it rattles back into subsonic flight.
I was by myself for this run. If I have help next time, I may put someone in the pits and try to finish the zero verification at 600y.