I have an 8x60R double rifle, and a problem. While I have made brass from 9.3x74r, that is not satisfactory because the head is too small, and with any kind of decent pressures will soon cause separations. I find I can buy, reasonably, 8x60S rimless brass, so intend to build a rimless extractor to replace the rimmed one. I am looking for ideas on how to design this so it can be machined without EDM capability. Simplicity is of course a good thing, as is reliability. I don't seem to be able to find any real good pictures of commercially made ones, or drawings. Any help would be greatly appreciated!!

Thanks, Doug