Punch Through

Does anyone know how much innate punch through charged bow shots have?

I'm sure I've explained everything at the topic.

Since the release of the Zephyr Warframe I have not seen the punch through mechanic actually allow weapons to go through allies. At least, "Bow" weapons' arrows have not been able to punch through my allies. I often have an ally stand in the way of my shot and I do not see the arrow pass through or deflect, but simply stop like any standard non-punch through weapon would. This wiki article otherwise suggests punch through works on allies; I disagree with that information.

Do shots that have passed through multiple enemies lose damage?

The puncture page and tips section seem to imply that it isn't worth the mod slots and its only utility is for bad players who can't aim and would benefit from shooting through shield lancer shields but it seems hugely underrated if there is no damage dropoff (which seems to be the implication when applied to ogris, since I believe multiple enemies take the same base damage before the explosion triggers)

But no, seriously, while it's obviously conditional, (based on how/if enemies are clustered) if there's no damage dropoff, doesn't this mean it can be a theoretical 200% to <bignum>% gross damage increase?

ie. no puncture = one guy takes the damage from each bullet.
1.2m puncture = 6 guys in a row all taking the same damage from that one bullet that passed through all of them.

Ergo if it takes one clip to down one enemy, if you've got puncture, even if it's just one guy standing behind the guy you're shooting at, you've suddenly doubled your kill rate.

Or am I misunderstanding how the mechanic works?

Here's a thought, since puncture goes through thin walls and enemies, but usually two max...what if they were grouped together into one area, say by Vauban's Vortex or Bastille? If Puncture for the respective weapon was maxed out, would it pierce through more than just 2 enemies?