In the above table it is assumed that an error of estimation of 7.5% was made and that at ranges over 1000 m. two elevations were used. Against head targets, approximately twice the number of rounds indicated above must be expended; and against exposed skirmishers, visible at full height, about half of the number of rounds given. The efficacy is increased when the fire comes from a flank. The following data are taken from an extended firing test: At 600-700 m., 200 skirmishers, firing 5000 rounds against 200 body targets, obtained 4.3% hits and placed 43% of the figures out of action; under the enfilading fire delivered by one platoon, the percentage of hits rose to 10.5%, and the number of incapacitated figures to 80%. (d) Additional Influences Affecting Accuracy of Fire. Errors in setting the sight, in pointing, aiming, and pulling the trigger, increase the area of the beaten zone at the expense of fire effect on the actual target selected. When we consider the excitement of men in action, and the numerous sources of error in setting the sights, in pointing and firing, it is clear that we have to reckon with the =effect of misses= on the field of battle more than with the really well aimed and well delivered collective fire of a considerable number of marksmen. Lieutenant Colonel Wolozkoi, late of the Russian Army,[164] attempted to obtain an approximate standard of measurement for the errors in firing made by marksmen. He bases his deductions upon the opinion that the efficacy of rifle fire in action depends entirely upon the mental and physical condition of the individual soldier at the moment; that in serious engagements this condition is such that accurate aiming cannot be expected; and finally that every skirmisher, according to the degree of his excitement or fatigue, will fire his piece at varying angles of elevation. He argues that this produces a rigid cone of dispersion, whose limits correspond to certain extreme angles of error, and whose axis (center trajectory) corresponds to a mean angle of error; that, for each class of rifles, the depth of the resulting beaten zone is constant; and that the depth of this zone increases with the range corresponding to the angles of error. It follows that the depth of this beaten zone is greater in modern rifles than in those of older pattern. [164] _Das Gewehrfeuer im Gefecht_, 1883. He believes that peace training will have fulfilled its mission if the skirmisher, while firing, holds his piece in the position to which he has become habituated through years of practice. This position can be none other than that in which the piece is horizontal.