IHMSA silhouette today is quite different from the game of the 1980s. A rule change resulting in removal of 3/4'' off the rear of the Ram feet changed the force necessary to knock it over. This was a good change as we no longer felt the need for ''more powder---bigger bullets''. Later, scope sights were allowed and there are many who benefit from their use. Then, we introduced the Half Size (1/4 area) targets. Each is fun and have their own challenges.
There is no set preference in bullet selection. Shoot cast or shoot jacketed as suits your needs. rp