Heck, for wadcutter target loads I would cut those WW's with a little pure lead, which would make them softer and weigh a tiny bit more. Take a look at the bullets in factory wadcutter ammo- they are darn near pure lead, only slightly harder.
If your bullets fit your throats and you keep velocity low, that's all that matters. They'll shoot. Don't stress too much over alloys for this kind of shooting!
(And they're bullets, not "boolits".
)
