Thanks for the reply Mike. I knew of the different bore sizes for the 8x57's but didn't know which my drilling was likely to be. It sounds like I'd be wise to slug it before shooting because the barrels walls near the chamber are not nearly as thick as the average bolt action. I've heard that people generally get away with shooting a .323" bullet in the smaller bore in a good bolt action, but I'd rather not try, especially with this. But that Sellier & Beloit might at least be a good buy just for reloading brass. I'm assuming regular rimless 8x57 dies would work if used with the correct rimmed shell holder.
