>>136561
I am intrigued, and this tickled the autism lobe of my BRANE. I was intrigued enough to look up some information and make some assumptions:
that's a Mauser K98 or something very similar
caliber is 7.92x57mm
ammunition is the most common interwar rifle ammunition using the 12.7g "heavy ball" projectile originally intended for machine guns, with a G7 ballistic coefficient of 0.293 and muzzle velocity of 760 meters/sec
the optical sight is on a typical period mount and holds the scope with its center axis between 5 and 5.5cm above the bore axis, so I put in 2.2"
zero is 300m, per German wartime doctrine
I ran some calculations and it seemed most plausible for a rangefinding reticle intended for this combination to be for distances of 300m to 800m. Assuming a target height of 1.7m, we get:
300m: 5.67 mrad tall
400m: 4.25 mrad tall
500m: 3.40 mrad tall
600m: 2.83 mrad tall
700m: 2.43 mrad tall
800m: 2.13 mrad tall
I also ran the numbers and came up with drop and wind data for that specific cartridge:
300m zeroed, 0.39 mrad wind per 10 km/hr
400m -1.11 mrad, wind 0.43 wind per 10 km/hr
500m -2.37 mrad, wind 0.70 mrad per 10 km/hr
600m -3.79 mrad, wind 0.88 mrad per 10 km/hr
700m -5.37 mrad, wind 1.06 mrad per 10 km/hr
800m -7.14 mrad, wind 1.27 mrad per 10 km/hr
Though, of course, it's only supersonic to a bit over 600 meters, after which accuracy drops off quite a bit due to turbulent vacuum drag at the transonic barrier. That doesn't stop designers from granting capabilities to the optic of which the rest of the system can take little advantage.
Now, realistically, well, I assume that what is depicted is an artifact from a world with a very different history, not corresponding exactly to anything in the world we know. I see that you have combined what I am assuming are circular dots arranged one milliradian center to center with what they call in the trade a "choke" rangefinder similar to that in the old Soviet PSO-1 sniper rifle scope.
The bolt-action rifle makes me feel like we're looking at something set anywhere from between the World Wars to the early to mid Cold War. The reticle is an anachronism on multiple fronts. Mil dots are a 1970s innovation created in the US, as far as I know. They are an improvement to old-style reticles that were two pieces of wire that crossed in the center, in this instance with small round sheet metal dots very carefully soldered or laser-welded in place at intervals along the thin part of the wire near the center. That rangefinding scale, and the digits around it, would have to be rendered on an etched glass reticle instead. Etched glass reticles for optical sights existed during the Second World War but the expense made them a feature of things like submarine periscopes. The ability to make them smaller and more precise did not exist until the 1950s, possibly later.
The tl;dr is, I can't read the numbers but just from its proportions that rangefinder reticle looks weird to me. I've attached one rendered at 100 pixels per milliradian. Because of the way humans perceive lines this thin, it's laid out for measurements from the center of the lines at the top and bottom rather than the gap between them.
>>136618
That too.
Read the RULES before posting. Current Announcement: Chapter update for Immiscible >>>/anthro/136266 Make or change an announcement