Does anyone else do this in shooters?

The ammo reserve has to make sense with the ammo capacity. So if the magazine holds 13 rounds, the ammo reserve has to be a multiple of 13. If it holds 5 rounds, it has to be a multiple of 5. My ammo has to look like 13/65 or 5/45 etc. If it's 13/68 or 5/43 or soemthing I will literally waste ammo to make it right. I first started doing it with New Vegas and I haven't been able to break out of the habit.