Go to the Cast Lead Bullet Association web site:
Their members have been casting, experimenting, developing, competing, hunting, etc. with cast lead rifle bullets for many, many years. They are the authority on the subject.
This is the other good cast bullet site:
Between the two sites you will be very busy.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill? (Exodus 22:18)