My friend Greg never used GC bullets as in SA Hornady GCs cost $100 per thousand, but wheelweights were free. He used Lee Liquid Alox, loaded bullets as-cast and unsized and used the Redding Profile Crimp Die which I brought when I came to visit and hunt.
If you go back and read Keith's Book Sixguns and loads, he favored bullet weight over velocity and favored softer alloys:
Elmer Keith’s book Sixgun Cartridges and Loads (1936) on pgs. 69-70 states:
“For most revolver cartridges, including all light and normal pressure loads, there is no use to having the bullets harder than one part tin to twenty parts lead for really heavy loads a one to fifteen mixture is hard enough… For automatic pistols, the bullets should be very hard, consisting of about one part tin to ten parts of lead, in order for them to slide up easily out of the magazine into the chamber… A mixture of part tin and part antimony works very well for some heavy loads, but such very hard, brittle bullets are not needed for any revolver load except in the case of extreme penetration, where no upsettage or expansion is wanted.”
I have found Keith's suggestions to work in my last 50 years experience following them.