(iii) =Lee-Metford or Charger-Loading Lee-Enfield Rifles.=--With Mark VII ammunition, fixing bayonets has a negligible effect. When firing Mark VI ammunition from the Lee-Metford or Charger-loading Lee-Enfield rifles with fixed bayonets at ranges up to 600 yards, the soldier should aim up very slightly, taking care, however, in doing so to aim low in all cases, and to aim at the ground-line in firing at troops advancing towards him. =15. Effect of Resting the Rifle.=--For practical purposes, the shooting of the rifle is not affected by resting the muzzle or any portion of the stock lightly on earth or other substance. =16. Effect of Oily Barrel.=--The first round fired from an oily barrel is liable to follow an erratic course, the rifle throwing sometimes high, sometimes low, and at other times to the right or left. A dry rag should therefore be passed through the bore before practice is commenced. Section =9=.--Dangerous Space--Ricochets--Firing Up and Down Hill. =1.= Dangerous space may broadly be defined as the whole ground covered by the trajectory of a bullet from the point where it could first come in contact with the top of an object fired at to the point where it falls to the earth (Figs. 4 and 5, and Figs. 6 and 8). =2. Extent of Dangerous Space.=--The extent of dangerous space depends upon the following factors: (i) =Range.=--Dangerous space decreases as the range increases, the reduction being due to the steeper angle at which the bullet descends at longer ranges (compare Figs. 4 and 5). (ii) =Firer’s Position.=--The position of the firer and the consequent height of his rifle above the ground will affect dangerous space. _The nearer the rifle is to the ground when it is fired, the greater will be the extent of dangerous space._ (iii) =Height of Object.=--As a rule the higher the object fired at is, the greater will be the extent of dangerous space. (iv) =Trajectory.=--The flatter the trajectory--the closer the bullet keeps to the ground in its flight--the greater as a rule will be the extent of dangerous space. (v) =Conformation of Ground.=--The more nearly the slope of the ground conforms to the curve of the trajectory and to the fall of the bullet, the greater will be the extent of dangerous space (see Fig. 8). =3. Example of Conditions affecting Dangerous Space.=--The following example illustrates the method by which the soldier may be made to realize the importance of this question, and the principle which underlies its influence upon the effect of fire: If he is firing in the _lying position_ with Mark VI ammunition, and aims at the ground-line of a prone figure at 500 yards range, the dangerous space of his fire will be _about 50 yards_. If, however, _he stands_ to fire at the same target, the dangerous space will be reduced to _about 40 yards_. [Illustration: =Figs. 4 and 5.=--DANGEROUS SPACE. _Note._--The angles of descent are imaginary, and not accurate for any distance.]