I have no intention of casting my own bullets, so I am wondering if anyone makes 30-30 gas checked bullets that are cheaper than the Speer bullets I use for silhouette? The Speer 170s can be had for about $0.22/each. Folks that shoot cast in silhouette swear by them and say that cast has better take down because it "dwells" on the target longer. I've searched, but never found anything.