As a kid back in the sixties I was working in the model shop at A O Smith. Great bunch of guys. I was wrestling with my first build and there was the issue of drilling for the ramrod. The fellas took it upon themselves to get me fixed up, and to that end brazed a 5/16" twist drill to the end of a v nicely straightened length of hydraulic tubing. It worked great and I still have it, but much prefer a gun drill. Simply, they are tough, get the job done correctly, and are easy to sharpen.