Not a real answer to your question but I just randomly noticed midway has a lot of the 284 sheehan dies on sale. Again I just randomly noted and I'm passing it on.Evening all!
Just dusting off an old thread… I'm looking for somebody who can ream out a .284 Wilson seater to 284 Shehane. Having the same issues as the OP, but worse because the UK is so much smaller! Really struggling to find off the shelf arbor micrometer seaters for shehane and I do really like the Wilson seaters.
Any help appreciated. I'm state-side in a few months so hoped to source one before I come over..
Any info/help would be ace!