I have used Lee liquid Alox since it came out. I have used it in rifles, pistols, revolvers, and my TCs. I have never had a leading problem with any of them.
A few years ago I got a 10" 357Max barrel for my TC. I got 500, 180gr Laser Cast Bullets at the same time. I got a good load going with the Laser Cast Bullets going 1860fps. The only trouble was that I got heavy leading after a few rounds. I didn't want to shoot 3 or 4 on a hunting trip and then clean it before I could shoot it again so I tried coating them with Lee liquid Alox and shot the same load. Not only did I get no leading but it cleaned the barrel cleaner than it was. The bullets coated with the Lee liquid Alox actually cleaned the barrel.
I use a Lee 358-166 gr SWC in my Rossi 92 rifle to shoot Cowboy Rifle Silhouette. I cast these bullets out of soft, recovered 22LR, range lead. I shoot them at 1200fps. I have never had any leading in this rifle using Lee liquid alox.
I shoot a 10" 22 Hornet barrel for NRA Hunter Pistol Silhouette. This year I started casting a 55gr RCBS bullet, cast from the same soft lead for these matches. These bullets are going 1750fps according to my Chrony. I have shot several hundred of these in matches and practice. Again no leading.
In my opinion, if you are getting severe leading using Lee liquid Alox, your problem is not the lube you are using.
Sixgun