I was pointing out in the form of a question, that the company itself says to use them for cartridges (btw the company does not mention wax paper being needed), so there probably isn't a problem with powder degradation over time.
Even though it's insinuated that the wads are safe to use without additional powder protection, the label offically stays neutral on the subject and lets the user decide.
What's the worst that could happen, that a small portion of the powder charge gets contaminated?
They probably don't expect folks to compress enough lube out of their wads to affect their whole powder charge.
For all we know a person could try really hard to get the lube to migrate and only succeed in affecting part of the powder charge, and maybe such a small part that only a chrony could detect how much.
And if the company earns greater profit by the use of multiple lubed wads in each case as opposed to filler, then why should they bother warning the user about the remote possibility, when that just costs them more ink on the label.
And what should they write on the label - "BEWARE OF POWDER CONTAMINATION"????
As far as insurance to protect the powder, the lubed felt wads can be used in combination with filler, dry wool wads, wax paper, over powder cards, or Walters Poly wads which come in 2 thicknesses, .030 & .060.
That's a lot of insurance options against lube migration whether actually necessary or not.
Poly wads: --->>>
https://www.buffaloarms.com/reloading-supplies-accessories/wads/poly-wads
Dry felt wads: --->>>
https://www.trackofthewolf.com/List/Item.aspx/174/1