Im in a position where I have a good supply of pure lead along with an almost equal supply of WW. My initial tests were an attempt to come up with some mix that would work for my bullseye shooting and use both. Shooting a 200gr bullet at less than 800fps doesnt call for a hard alloy by any means. As a matter of fact Ive had very good results with Star swaged SWC bullets and they are about 6 BHN. I was water dropping my bullets for convience and right after casting they were right at 10 bhn
I shot the 50/50 WW/Lead mix last year with very good results. One snag was that the molds I had were throwing bullets that were on the small side due to the softer mix. I had Ballisticast make me up an H&G 68 4 cavity mold that throws a .454 bullet with 50/50. I push it thru a .453 sizer and end up with a .4525 bullet. Using Lars red lube I can shoot hundreds of rounds between cleanings and get zero leading.
This year I will try some with even less WW added or even some with just a Lead/tin mix. I know other Bullseye shooters that have had great results doing just that.
I would like to get them to where the sizer is just barely touching up the OD of the bullet when lubing.
One point on some of the old theories that dont always prove out. Ive known shooters that would get leading and poor accuracy using WW or a softer alloy, they would keep adding Lino and bingo they would start getting good results. Their first thought would be the alloy was to soft. Well perhaps, one thing they didnt realise was that as they were getting an increasingly harder and harder alloy their bullets were dropping a little larger from thr mold. Also when they sized their bullets they would get more springback with the harder alloy and the end result would be a better fitting bullet, less leading and better accuracy.