Simple. Your Opacity Mask's black is actually dark grey.

CMYK or RGB?  Your opacity mask needs to be 100|100|100|100 black when you work in CMYK where you want it completely knocked out.  Right now I'm guessing it's 0|0|0|100

Whether you're pasting into an RGB or CMYK document, in Photoshop, also matters. Just tested it.

Or change the color mode to cmyk in Photoshop

To MHossey do yourself a favor don't worry about it it looks good to me and when if this is being printed then chang the photoshop file to CMYK and then paste but either way it looks good.

There is no such thing as perfect so job well done BTW!

You do every day of your life settle for the limitaions of the fcts of life and this is not a software issue it is the waay things are. Two different color gamuts all there is to it I do not believe the issue you are pointing to has anything to do with this limitation.

You will simply get two different results from RGB and CMYK from the same art.

But if you wish to bang your head against the wall feel free.

Once you accomplished soething that is great perfection is irrelevant and so is the way you want it to be.

Uhh yeah . . . ok, Wade. Whatever, man. Your cowboy hat mayb be a bit too tight, today.

Ok, so the grungemap you like was originally  -Or-  is vector?

I very highly recommend you not use a rasterized image of it for an Opacity Mask, if you have the original vector.

Rather, save your fresh, clean vector lines,

make a copy,

place the vector grunge above the copy (in other words, save your logo's various iterations as you progress through the design process),

select both logo and grunge and hit Pathfinder Panel > Divide,

delete all original grunge paths.

Your left with a logo that's been permanently knocked out. For the one-color version, make it all a compound path for maximum easability when placing it in layouts, pasting in Photoshop, etc.

(a little design crit, not asked for, but since I like your design: you sure you don't wanna chop off either left or right side of the wings, mirror it over and merge it back together so the wings are perfectly symmetrical?)

Yeah, I save time with pre-done stuff pulled off the web, too. If it works, it works!

Oh ok, does your file-keeping system pertain to similarly numbered proofs sent out or something? I find it very convenient to start and end all in one file, just alt+dragging to the right whenever I want to save an iteration. All previous steps are right there if you need to go back or "go back in time" and grab something from a previous iteration. I most usually save the final version out into a nice, small, clean file, so the done deal is all by itself and easily embeddable in other stuff.

One trick you can do when using a Pathfinder operation to do a knockout is color the knockout paths (in this case, your vector grunge of course) bright pink or any unique color. Do the pathfinding Divide or however you want to do it and use the Magic Wand to select only that nasty pink color, then delete, do a path clean-up and BAM - finito.

Converting to a Compound Path can be great if you're all done with everything - it makes it harder to accidentily move peices of your logo around without the rest of it, makes selecting it a bit easier.

If you have a path, like a letter "O", it's actually two closed paths that comprise one Compound Path, so the knockout can take place, otherwise it's just two elipses stacked up. As always, there's pros' and con's to either using a Group or Compound Path to hold it all together as you place it in other stuff. Though, it sounds like you're going to use it in Photoshop anyway, so kind of a moot point. It'll just be a Smart Object in PS.

Ah ok, so you're not really after perfect symmerty - just making sure you didn't painstakingly draw both sides manually haha.

You don't like my hat size do you! well!

Hehe, Wade.

Awesome, happy to help. Spread the love'n!