flash hole deburr help

[Texas Solo]

I figured I'd have to modify something to work in a drill. I did not see anything on the K&M site that was cordless drill ready, so I might as well cut up a new Lyman or RCBS.
But here's what is probably a dumb question:
Why not just use an ordinary drill bit? I just tried one and it seemed to work perfect. What am I missing?????

[Patch700]

I figured I'd have to modify something to work in a drill. I did not see anything on the K&M site that was cordless drill ready, so I might as well cut up a new Lyman or RCBS.
But here's what is probably a dumb question:
Why not just use an ordinary drill bit? I just tried one and it seemed to work perfect. What am I missing?????

Theoretically there is no reason that won't work so long as you :

1) Install a collar on the bit so the depth it cuts is controlled and very minimal and all brass is trimmed to exactly the same length as you'll be utilizing the case mouth as a stop so to speak.
2) Ensure that the size of the bit doesn't enlarge the hole itself and merely removes the burr or flap if you will... Oversized flash holes are a proven way to destroy accuracy via inconsistent ignition .

In my opinion this is one of those areas where a little goes a long way so I would be careful with the drill setup , you see people post videos all the time of them trimming brass with their fancy drill , running the case into the cutter for a period of time that makes you wonder if the brass is being melted or trimmed lol..