234 MANUAL FOR NONCOMMISSIONED OFFICERS. 



the leaf is seldom used. The oi^en sight at the upper edge of 

 the drift slide is adjustable from 1,400 to 2,750 yards. To set 

 it the upper edge of the slide is made to correspond with the 

 range reading on the leaf, and the slide is then clamped with 

 the slide screw. This sight also is seldom used. The open 

 sight at the bottom of the triangular opening in the drift slide 

 is adjustable from 100 to 2,4.50 yards. To set it the index line 

 at the lower corners of the triangle is set opposite the range 

 graduation on the leaf and the slide clamped. This and the 

 peep sight just below it are the sights most commonly used. 

 To set the peep sight, the index lines on either side of the peep- 

 hole are set opposite the range desired and the slide clamped. 



Notice the scales for the various ranges on either side of 

 the face of the leaf. The odd-numbered hundreds of yards 

 are on the right and the even on the left. The line "below the 

 number is the index line for that range. Thus to set the sight 

 for 500 yards the index line of the slide is brought in exact 

 line with the line on the leaf below the figure 5 and the slide 

 clamped. To set for 550 yards the index lines of the slide are 

 set halfway between the index lines on the leaf below the 

 figure 5 on the right side and the figure 6 on the left side. 

 Look at your sight carefully when setting it and take great 

 pains to get it exact. An error in setting the width of one of 

 the lines on the leaf will cause an error of about 8 inches in 

 where your bullet will strike at 500 yards. 



The wind gauge is adjusted by means of the windage screw 

 at the right front end of the base of the sight. Each gradua- 

 tion on the wind-gauge scale is called a "point." For con- 

 venience in adjusting the line of each third point on the scale 

 is longer than the others. If you turn the windage screw so 

 tliat the movable base moves to the right, you are taking right 

 windage, which will cause your rifle to shoot more to the right. 



It is seldom that a rifle will shoot correctly to the point aimed 

 at at a given range with the sights adjusted exactly to the 

 scale graduations for that range. If your sight is not cor- 

 rectly adjusted for your shooting and you wish to move it 

 slightly to make it correct, remember to move it in the direc- 

 tion you wish your shot to hit. If you wish to shoot higher 

 raise your sight. If to the right, move the wind gauge to the 

 right. Always move your sight the correct amount in accord- 

 ance with the following table : 



