Congressional serial set Volume 4790

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...obtainable with the mount was 18 degrees; 200 rounds were fired in 45 seconds. The feed mechanism failed once to present a cartridge in front of the lock. Aim not deranged. (c) In making this test the gun was disconnected from the elevating screw and was elevated and depressed by hand; 200 rounds were fired in 37 seconds, the gun being Kept constantly in motion between the greatest depression and elevation obtainable. The angle of variation was about 40 degrees; action of feed excellent. Aim not deranged. Total number of rounds fired, 1,889. Test 8. The gun was cleaned and oiled and the jacket filled with water; 4 sighting shots; 200 rounds were fircd in 'SU seconds. For 175 of the 180 hits the horizontal distance between extreme shots was 5 feet, and the vertical 6 feet. Five shots struck some distance from the other 175. Nearly all of the hits were near the bottom of the target in a space 5 feet horizontally and 3 feet vertically. During the firing the iine of sight worked up 2 feet on the target. Three leaky primers were found. Second trial.--One hundred and ninety-seven shots were fired, time lost, with 187 hits. The horizontal distance between extreme shots was 6 feet and the vertical 9 feet. The last few shots struck below the target. During the firing of this series one cartridge case ruptured three-fourths of an inch in front of the head; one shell showed signs of rupture 1 inch in front of the head; one shell was split in the neck; one primer leaked, and one cartridge was found with a rim 0.069 inch thick, which was too great for the extractor to engage. The firing was stopped by the ruptured shell and also by the thick-rimnied cartridge. Aim not deranged. After firing the 197th round, one shot was fired which struck near the first of the series, s...