Chronos are excellent with the silver steel, and great service, and I use them alot for general workshop bits and bobs, but they do not seem to be particularly specific with their materials in general- they sell aluminium bar but to date have not been very specific with alloys and so on. I suppose thats not such a consideration with their predominantly model engineer market. Ho Hum :-)

As adam says, and as I was going to suggest earlier before I was called away, is that, silver steel being easy to machine, you could build more of a custom, more suitable weapon. Drills and End Mills are only effective under very controlled conditions, eg a mill, lathe, drill-press and so on. Robot wars is about as far away from these conditions as you could possibly get. Id go for a more instinctive, dare I say it crude, weapon, with simple bashing and bludgeoning in mind, as opposed to something designed for the controlled removal of material.

Silver steel really is a pleasure to work with, and hardening it is a sinch- all you need is a bucket of water and apropane torch. There are some excellent guides for doing this on the net- worth looking in to.

Ed