Can't you use a commercially loaded, unfired round as a "go" gauge? I can buy a no-go gauge, but I'm pretty cheap and would rather buy a box of bullets instead of a go gauge.
You can do that, but ammunition has a +/- tolerance built into it. Ackley mentioned using that technique but recommended against it.
What I did for a cheap "go" guage was a full length resize of once fired brass on my resizing die, plugged the primer hole and filled it with epoxy. That way the brass wouldn't deform if it was put into a chamber that was cut too short. This is useful when cutting a chamber specifically for your reloading setup.
I've heard of it being done, but I don't recommend it. If you don't want to purchase the gage, then you can rent them from 4D Reamers for a few dollars. If you are looking for something in a .308 based cartridge I could loan you mine as long as you promise to return them.
Thanks taylorce1 for the recommendation on renting, I didn't know that would be an option.. I haven't decided just yet what caliber, but likely it will be .223. Either way, I'm going to be away from my rifles for about a year, so nothing is going to happen right now. The number two contender has always been a .243, maybe I'll take you up that when I get back.
I'll probably end up buying my own since all you guys came back with basically the exact same answer. Thanks for a good safety check, sometimes my brain gets me in trouble
NO!
Cases have variations, if you doubt this buy a box of the most high end loads you can find & measure them for the shoulder.
Dies don't have variations, that's why they are
a) expensive ($25~$30) &
b) made of a stable material that won't change like tool steel.
Use the right tool for the job or you may find out the hard way you ruined a $5.000 knife skinning a **** for a nickel.