"When opportunity knocks!!!"

DonVoigt · 03-16-2017, 02:54 PM

Using 4"(barrel length" accounts for a factor of "two" when the sight radius is nearer 8".

Roberts calculation of a change of 0.001" = 0.22" at the target, sounds reasonable, if a pistol is shooting 4" high 4/.22= 18.2 or 18 thousandths more height required, add .018 to 0.022 original height and get a sight blade of 0.40 required.

Some how Robert made a compensating error of 10 in the calculation, since if one uses the 8.1",
one gets the 0.22"

So in this case, two wrongs Do make a right!

03-16-2017, 02:54 PM	#19
DonVoigt User Join Date: Apr 2015 Location: near Charlotte NC Posts: 4,681 Thanks: 1,443 Thanked 4,355 Times in 2,041 Posts	Using 4"(barrel length" accounts for a factor of "two" when the sight radius is nearer 8". Roberts calculation of a change of 0.001" = 0.22" at the target, sounds reasonable, if a pistol is shooting 4" high 4/.22= 18.2 or 18 thousandths more height required, add .018 to 0.022 original height and get a sight blade of 0.40 required. Some how Robert made a compensating error of 10 in the calculation, since if one uses the 8.1", one gets the 0.22" So in this case, two wrongs Do make a right! __________________ 03man(Don Voigt); Luger student and collector. Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie