Review on Hillman Group 375286 Concrete 100 Pack by Hassan Tomlinson

The masonry drill that comes with the 3/16 screws is 5/32 (the drill is only 1/32 smaller than the screws). No matter how carefully I tried to drill a hole in the concrete block, it always turned out to be too big. The screw was not firmly screwed into the concrete. I didn't use a hammer hoping the holes would be smaller. What was the TAPCON manufacturer thinking? Drill holes in concrete are not exactly round. These screws are expensive. Do I need to buy a set of tiny masonry drill bits now? Update (2 weeks later): My final solution was to use two drill bits. I use a 1/8" drill bit to make a full depth hole and then use a 5/32" but only about 1/2" deep. This works but requires the use of two drill bits. Tapcon should have avoided this problem.