Meaningless Limitations - Excluding Things not Available in Game World

[Nedorus]

While designing stuff for my upcoming Iron Kingdoms campaign I was looking into Single-Skill limitations for Imbuements (see my other thread).

While reading up on stuff, I was wondering whether I should apply / allow a limitation that limits the character to things that are really the only option in the game world anyway.

Limitations often narrow applicable use down by categories but the larger category may be the same as the narrowed down version in a particular game world (like "all life" vs. "all carbon based life").
How do you handle this?

In the particular example that sparked the question I had this:
GunFu's Gunslinger advantage lists:
Gun Rack -40% limitation as All one-handed ranged weapons used with either Beam Weapons, Guns, or Liquid Projector e.g. 'Guns (Pistol) Only'
Type -60% limitation as A subset of everything used with one specialty of the three skills above e.g. 'Revolvers Only' or 'Blaster Pistols Only'.

In the Iron Kingdoms (my version anyway) there is only one type of handgun (muzzle or breech loaded flint locks). This makes the two limitations above virtually the same.

Should I still apply/allow the -60% version?
Why / why not?