Bushing size accuracy
I have a new Redding Type S bushing die. My 308 loaded rounds measure 0.335 OD of the neck so I purchased a 0.334 and 0.333 bushing. When setting up the die I was able to achieve 0.001-0.0015 shoulder bump and the sized OD of the neck was 0.334. However that was with a case that had just been shot and lubed. Now I just annealed 300 pieces of brass and my sized OD of the neck is a consistent 0.332. Same lube, bushing, brass, etc. The only thing that changed is that the cases were just annealed and allowed to cool to room temp. So what makes the bushing size smaller on an annealed case versus non annealed case?
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@srastello78 I will definitely look into that. I just tried my .333 bushing and the sized OD is .331. Redding states to test for adequate tension by "The simplest method to perform this test is to press the tip of the loaded cartridge against the edge of your reloading bench with moderate pressure. The bullet should not be seated deeper in the case if you have sized at least one caliber of the case neck. If the bullet is seated deeper in the case, switch to the next smaller size bushing and start again." So I will definitely do this test once I get these larger bushings in.