I am in the process of turning a Troy Claymore muzzle brake into more of a flash suppressor. The brake is made of very hard steel and is a real bitch to drill through. I was currently using a Lawson 1/8" pure carbide drill die bit, but then I broke it because I was going to fast and not using enough oil. I was wondering if there is any other bit that might be better for this task before I order another one, they are like $15 a piece.