4th Horseman,
Not certain exactly what you're driving at, but to answer your question...
Manufacturers that SPECIFICALLY recommend the use of lead bullets?
None that I can think of.
I can, however, think of many that specifically recommend the use of FACTORY ammunition only, without drawing a distinction between lead and jacketed bullets.
In fact, most of them, if not all of them, say that use of handloaded ammo can/will void the warranty.
But, given the fact that ALL of the major manufacturers -- Federal, Remington, Winchester, etc., -- offer all-LEAD bullets in their handgun ammo, including some loading semi-auto rounds with lead bullets, and the handgun manufacturers make no admonitions against the use of lead factory loads, you draw the inference.
Also, Smith & Wesson for many years had its own ammunition line. Yep, they loaded lead bullets, and recommended SPECIFICALLY the use of S&W ammo in S&W guns, again drawing no distinction between jacketed and all-lead.
Think about it, guys. Lead bullets have been around for a LOT longer than jacketed bullets.
Jacketed handgun bullets didn't really come into their own commercially for semi-autos until the late 1890s early 1900s, when the semi-auto took hold.
Jacketed bullets for revolvers, though, didn't come into common usage in factory ammo until after World War I.