The pins used with 21- and 23-gauge guns are so small that it’s very difficult to determine the angled tip end from the non-existent head end. Knowing this, some nail manufacturers print directional arrows on the side of the strip. These arrows work well, until you’ve fired through that section.
To provide a can’t-miss reference, use a permanent pen and draw arrows on each strip to indicate which end goes down. Doing this will not only prevent an upside-down clip, but will encourage you to use up those partially-used strips that litter the bottom of your toolbox because you can’t see which end to shoot into the wood.
