DP - at any range, those small bore pistol bullet slingers have nothing on a large bore and probably don't kill as well as a .50 RB out to 100yards either. I am talking of elk and moose here. I felt well armed and protected when hunting around in the grizzly bush for moose. I was armed with the 14 bore rifle laoded with RB's. I would not feel well armed with a sabot-slinger. Any .54 or larger would be preferable. Give me bore size and a ball that penetrates for hunting. While I didn't quite get the exits Keith did, I wasn't shooting a 600gr. RB, either. The little 480gr. RB still would break a shoulder, punch out 6" of rib and stop underneath the hide on the off side on a bull moose.
As Baker, i jsut had to try a slug, so made a mould casting a HB conical, with a hemispherical head. The lightest the mould would cast was 580gr. and recoil with that wasn't too bad, but it gave nothing over a WW ball for penetration. The HB's had to be cast of pure lead and flattened out badly on penetration tests. With a WW ball, I once blasted a couple solid 3"x12"x20" 'bricks' . The brick shot with the WW alloy RB disintegrated into pieces, the largest of which was about 3" angular chunk - the rest smaller pieces and dust. The one I shot with the 'minnie' merely broke in half, abeit grudingly. The minne was broken into pieces and left a large lead smear on the lead at impact - that was evident and I and I only found a few small pieces of lead, while the WW ball, completely flattened to about 3/8" thick and slightly cupped back with a stress crach running almost side to side, I still have in my re-claimed bullet box. It was obvious which one hit harder. Both were shot with the same load 165gr. of 2F and both hit almost the same POaim at 50 yards. The recoil was slightly more with the slug and it dropped about 5" low. I found this interesting due to the weights were only 100gr. different. The mold allowed bullets to 1,200 gr. I cast a few, but used them for decoy weights instead of firing them. Further testing for a fast loading second shot led me to the development of accurate shooting paper ctgs. which could be loaded and fired in 8 seconds.