I see that the game saver packs are 3 ounces and directions say add 2 quarts of water. I see that they have other ingredients than the acid itself. Spice extracts. I've seen others say use 1 ounce per quart. Obviously an important factor would be what % the powder is. It's easy enough to get 100% food grade citric acid.
So my question is would making a more potent batch present any problems? The stuff is cheap so why not add as much as will dissolve into a the water? Since I've also read that you can sprinkle the concentrate directly on the meat it's safe to say that some undissolved powder on the bottom of the spray bottle shouldn't be a concern.
My thought is that I would rather let the meat dry than to keep re-spraying it periodically and rehydrate it. But if I want to spray once and be done of conditions allow why not apply a serious dose the first time. Also if I do need to reapply why not skip the water and use it dry and really create a nice dry crust on the surface that should really last and not need another application.
Nothing is more tragic than losing meat after all that goes into it including taking the life.