Finally saved up some more newspapers and shot a little more. All were shot at 50 yds, as before.Velocity and penetration slightly less compared to last time due to powder I was using( more accurate. ) Bullets are SST 250, SST 300, and Barnes Original 458 300 gr. Paper was re- packed between shots. The long and the short of it: 250 SST acts like a varmit round, left a huge channel but disintegrated, looked like someone put "Sparkle" paint down the hole from all the micro- fragments, only picked out the 6 largest. 300 SST even larger channel and was a perfect mushroom. Barnes Original also cut a nice channel and retained 95% of it's wt.!