If possible, use a pillar drilling machine as it allows you to better control the centering, speed and feed . High feed rate is required and your speed is rather low when drilling.
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See the table below for information on the speed and feed settings and the type of cooling. You can download the speed table as a PDF file. Click on the image.
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If you do not have a pillar drill available, use the pointed side of the punch and a hammer to make a small recess in your stainless steel workpiece. This gives you better guidance and prevents slippage when drilling. The center punching compresses the material a bit, but mainly the material is displaced to the side and over the top of the material. This does not pose any extreme challenges for the twist drill.