Paul- While I welcome your comments based on your experience, I have the feeling you are talking about cartridge black powder conical shooting. This thread started with a need for info on possible conical use in a Jack Garner .40 ML.
I have shot the Hornady Great Plains bullets in .50 and .54 caliber, Thompson Center's .50 Maxi-Balls, and Buffalo Bullet Company's .50 Maxi Ball-et. None of these is shot with a base wad, and they shoot very well in 1-72 twist barrels, though one well-experienced hunter said that stability was not good enough for shooting moose or elk.
Sam Fadala said in his Black Powder Handbook, 3rd edition, "at this time I can safely say that most BP conicals do not require gas checks (to safeguard the base of the bullet from gas damage)". In Lymans BP Handbook, 2nd edition, Fadala said "conical accuracy is best achieved by lubing the base only, a dab of grease or paste doing the job." Also re lubricants: "Some conicals were prelubed by the manufacturer. If (Lyman) lubed them, they used Ox Yoke Wonder Lube 1000 Plus or Hodgdon Pyro Lube." They did not mention wads. On page 308 re BP Cartridge data, they said "We did not use wads in our test shooting." I also read two articles by Layne Simpson where he used the .50 Lee REAL and Maxi Balls, and he did not normally use wads, though rarely he did.
Tanstaafel: When you were packing your .58 Hawken on the Kenai loaded with Lee REALs for moose and possibly for a life defending situation with griz, were you using wads? Of the 40 molds you have, do you commonly shoot wads under your conicals?