You want to remove .30" from the pin? I doubt it will clear the flash hole at that point. It'll probably just jam the beveled part into the flash hole inside and still not give you the length you need as the end of the pin wont be touching the base of the shell holder. There wouldn't be much of a pin left on the end at all after removing that much material.
You could see if a local small machine shop can make you one. Or try an ad in the EE for any machinists in your end of Canada with a lathe at home. Would take minutes to make and cost next to nothing in material. Or you could provide any longer .30 cal gauge for them to shorten. One for 7.62x39 would be perfect but one for even a 308 or 30-06 would probably do the job.