I need a 1/2" end mill with a corner radius for cutting 303 annealed stainless steel. The operation is cutting an angled surface on the side of a block by lowering the end mill next to the block to the depth of the angle then moving up and back to cut the angle in one motion. The first cut is the full width of the end mill and then additional cuts are taken to widen the slot. So it is kind of a side cutting/slotting/surfacing operation. We have used a large corner radius (.090-.125") before, but is this better for resisting chipping? Am I correct in thinking that a variable flute would not be desirable?