With semi autos some of the energy is used to chamber the next round which would otherwise be used to throw the projectile so they have less power than revolvers of the same caliber although the difference might be marginal.
No, sorry this is WRONG!! The energy used to chamber the next round comes from the spring(s), and the energy used to compress those springs is RECOIL energy. The same energy that is wasted in a revolver, because in a revolver (or a single shot) the recoil energy does no work, other than to pass into your hand.
Newton's third law, again. Equal and OPPOSITE reaction. Recoil energy is the opposite reaction, and does NOT have ANY EFFECT on the bullet velocity.
Also, I can comfortably conceal-carry my .44mag Model 69, but I never could hope to conceal-carry the few semi-autos chambered in .44mag.
Really?? You don't own a jacket????

I don't own a model 69, but I do own a Desert Eagle, LAR Grizzly, Wildey, Coonan, and Auto Mags. Also a 6.5" S&W M29, 7.5" Ruger Super Blakhawk,and a 10" T/C Contender, among others.
All of which effectively disappear underneath an old GI field jacket. Not that it matters. There are more uses for handguns in my world than just defensive concealed carry, and not every gun I own has to fit into that niche.