[NonWonderDog]

See this one:

http://www.youtube.com/watch?v=G7KvpWloagE

Yeah, I've found a whole heck of a bunch of a lot of photos of the Mk.VIII reticle, and several from that gunsight at the Smithsonian. I've only found one picture that wasn't a ladder reticle--this is the reticle described in detail in a 1944 Navy gunnery manual--but I haven't found any pictures or references or anything to the reticle used on the USAAF version of the Mk.8 on the P-47. I assume it was a 50 mil ring, but I don't know that. In the next version you'll have the option of using Navy reticles on it if you wish.

I've found a couple pictures (this one is the only good one) of British GM2 reticles, and I think I've determined that the ring is, once again, a 50 mil radius. The horizontal bars should be adjustable in and out for ranging, but I think I'm going to put any adjustable GM2 Mk.II project on hold for a while.

I can't find much on the Russian gunsights. A search for "прицел ПБП-1а OR ПБП-1б" turns up lots of references, but no actual info. I did find a manual for a 14.5 mm AA machinegun's sight with a very similar reticle, and it said that the hash marks were every ten mils (up to 100 mils, for this particular sight) and that the rings were set for 1/2 and 3/4 of a crossing speed of 400, 700, or 1000 km/h (you could change the reticle, and there was a second reticle design that had a ring at the full crossing speed). One English webpage of dubious credibility (and which I failed to bookmark) confirmed that the circles on the PBP-1 reticle were set for crossing speeds of 200 and 300 km/h, and assuming a ShKAS muzzle velocity of 800 m/s, that gives the radii of the circles as 70 and 100 mils. All of that matches Oleg's gunsight. HOWEVER, photos of reticles here and here pretty clearly show the inner ring radius to be ~80 mils. I don't know what sights those are, though. The first one looks like it's license built (it's labeled MGS in Latin letters--East German?), and the second one seems to be some kind of frankensight.

I've also found plenty of pictures of ReVi reticles (and now even better Revi pictures, telescopes, periscopes and a Stuvi too!), and I've got enough sources for the dimensions. The circle is 10% of a radian in diameter (so 100 milliradians, just about the same as on the US gunsights), the hash marks are at one degree intervals, and reticles with open crosshairs have a 10 mil gap to the left, right, and above the post. The ingame reticles have a couple dimensions off, and all the gunsights use the same Revi C/12D reticle.