Having shot my Open gun for a few months, I still have no idea what the dot size is on the C-more dot. I’ve heard anywhere from 6MOA to 8MOA. According to C-more’s website, they have dot sizes ranging from 2MOA to 16MOA.
Not only do I not know what size the dot on my gun is, I believe it’s pretty old. The last match I shot, I couldn’t even see the dot in bright sunlight at maximum setting. So I bought a 4MOA diode module from someone on the forums and got to trying it out.
First, to find out what dot size it’s in my C-more :
According to this chart, the dot that I have is 8MOA.
Here’s how it looks like from my vantage point :
After installing the 4MOA dot module :
Frankly, the two dots look the same to me. The new module looks much like a 8MOA to me and is MUCH brighter so I stuck with it instead of my old module.
I’ve wanted to do this for a long time, as many people have been talking about dot tracking in open guns and how to tune a flat shooting gun. I thought I’d try to take high-speed video of the dot in my open gun while shooting various loads of .38 Super Comp that i’ve pre-loaded. To see how the dot jumps and settles back into view. The dream pattern, is for the dot to jump straight up without leaving the lens, and settling back down in the middle. As you can see from the video, that’s definitely not what I see. My dot goes up to 12 o’clock, drives all the way down to 6 o’clock, then back to 12 and settling in the middle.
I tested the following loads :
- 115gr Montana Gold CMJ, 11.0gr N105
- 115gr Montana Gold CMJ, 11.2gr N105
- 115gr Montana Gold CMJ, 11.3gr N105
- 115gr Montana Gold CMJ, 11.5gr N105
- 124gr Montana Gold CMJ, 10.0gr N105
I don’t see any noticeable difference in the dot movement between all the loads except feeling a "softer" recoil in the 124gr CMJ loads.
Caveat: I had to shoot in a slightly weird stance because I had to position the scope in front of my Casio Exlim FH100 camera to align it properly. That definitely affected my recoil management capabilities.
I’ve also tried shooting at a man-sized target at 200yards and was amazed at how accurate this gun was. That’s in the bonus section at the end of the video.