NitroX
|
| (.700 member) |
| 25/11/16 12:50 AM |
|
Re: William Evans .318 Westly Richards
|
Quote:
The formula used in the Skinner Front sight calculator can used for various ranges and is depicted as follows in the Lyman Reloader Manual (Appendix B):
M= (D/R) x S
M= Movement in inches needed to correctly zero your sights
D= impact deviation in inches (how far off from the aim point to the point that the bullet is hitting)
R = range in inches
S= sight radius (distance between sights)
Example: firearm is hitting 6 " low at 50 yards
D= 6" R= 50 x36 =1800 inches (for 100yds it would be 100x36 = 3600")
S=20"
M=6/1800 x 20 = .067"
0.67 " of sight adjustment is needed to zero the firearm.
I know that is just a hypothetical examle, but two-thirds of an inch wuld be a sizable adjustment to an iron sight! Then realised there is a decimal point error in the comment, it is 0.067 inches, higher. Very workable.
I wonder how Mick's adjustment would far with his numbers and a similar sight distance?
12"/(100m x 1.1 x 36")x say 20" = 0.0606" lower.
Very nice looking rifle. Which no doubt will get lots of work in the bush with you. Congratulations.