Did some calcs. a couple days ago just screwing around with the math for attempting LR 1st shot connections. Using my Ruger Mk. III the sight radius is 7.9" as measured with a caliper to the back of the front sight. The top to bottom of the front sight blade is .25". So to convert to MOA-- .25/7.9 = X/3600 = 114 inch per hundred yds./1.047 = ~100 MOA. Well my gunsmith and i didn't take into account the angle of the ramp--but that's no big deal since i already have 3 25 MOA units to play with (.055" per unit), which is more than any 22 rimfire can use probably. Here's the FS alteration--
I really love playing with the math on this stuff, and have already learned how easy it is to calculate the MOA from sight radius and vertical blade measurement. It could easily be done with the dot sights on some of the pistols as well, no doubt. In fact those short front blades that are used on some of the SA's would be a perfect match for this system--i'd bet.
What's the end result of all this some may be asking? I want to make a 1st-shot connection at 200 yds. on a 12" steel plate with my pistola'. Probably no big deal for some of the IHMSA guys--but for me--it's a big deal. Anyone else ever attempt this kinda' stuff with the front sight?
Here's te link to Ed Wosika's article i used for reference. Got this info from someone here on this site too--thks.!
http://www.fiveshot.org/guests/longrange.htm