I bought a Star sizer on ebay a few months ago and I am just now getting around to messing with it. It came with a sizing die marked .358, which is partly why I bought this particular one- because I plan on casting and shooting .38/.357.
So here's the situation: To verify that it is indeed a .358 sizer I pulled out the plug guages and this thing will pass only a .356+ (go) guage, nothing more. Did I get duped or is there more going on here like lead "springback" that can explain why this is the correct ID?
Please let me know something before I apply the .358 reamer to it! Thanks.
Edit: Before someone replies with the bright idea to puch a bullet through and measure it, let me explain that I do not have an instrument on this premisis that I trust to make a measurement this precise. Crappy reloading calipers I don't think will do it and I don't have a micrometer.