In the round days we didn't have "packers" for sport jumping except for student rigs. The closer you were on the manifest the sloppier the pack job would get, including using your reserve to hold tension and just giving the whole thing a good shake instead of flaking. I packed a few student rigs for a dollar apiece in Galveston. A student had a nice streamer on one of my pack jobs that opened slowly resulting in a nice soft opening shock. I got fired from packing but tried hard to duplicate that pack job on my own rig. Sometimes my rig seemed to open a couple seconds before I pulled, straining me through the harness.