Bushing Size Results ?

[Varmint Hunter]

Working with a new set of Redding bushing dies and ran into an interesting problem. Loaded round neck diameter is a consistent .313". I used a .311" Redding TN bushing in the Type S die to resize some once fired Peterson cases. The brass necks measured a consistent .308" when removed from the die. FWIW, I was using Imperial sizing wax.

I rechecked everything and measured with a different caliper but got the same results. While it is difficult to measure the inside diameter of a bushing with a caliper, I do get a measurement of .308", give or take. Has anyone else had a similar experience with a bushing? It appears that the bushing is mismarked.

 

[Dmagna]

I have had issues only when I am trying to resize too much. What's the fired size of the neck?

 

[crashlanding]

I think your bushing is stamped wrong. .003 is quite a big difference.

 

[crashlanding]

I went up and sized a case, Peterson 7prc brass , Whidden neck bushing die, Whidden.311 bushing, no expander ball. .03185 case has 5 firings on it, annealed each time it's loaded

 

[Varmint Hunter]

I have had issues only when I am trying to resize too much. What's the fired size of the neck?

Fired brass comes in at .315", but I'm not sure how the fired dimensions would make any difference.