1. Find a weapon which supports manual reload and reload from snaploader/clip (I.e. sks, blaze, mosin etc.) and a snaploader/clip appropriate for that weapon.
2. Load it manually using a stack of ammunition, preferably with an amount above 1
3. While still having ammunition in the weapon, perform a reload by pressing the R key so that your snaploader/clip is used.
4. Verify that you now have a stack of ammunition with the properties described in the description.