This one is the Harvestor Crush Rib; the bullet fits much better you dont have to fight it and not know if it ever got seated in the bottom of the sabot. The temp. was 94 degrees and this was the 7,8,9th shots I could still hold my hand on the barrel but it was hot and I knew my wife was waiting supper. The other 3 on the paper was an experiment with 130 gr of BH and it did not work the 3 SW200gr in the group were shot with 100gr BH and the Harvestor sabot out of a very hot barrel and are proably no where near what it will do in better conditions. Lee