Thread: Square necks
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Old 05-25-2019, 02:36 PM
hemiallen hemiallen is offline
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My thought is, from doing this myself ( 308 to 358) you may find out there also is runout on the deformed brass, due to the sized up brass's neck not being centered on the body. If you roll them on a flat surface is there a bunch of runout? This may be why the necks are not square to the case body. The neck thickness probably is also not uniform, being either thicker or thinner where it is longer. That extra length came from somewhere....

Also, Is this just-formed or once fired formed brass? If before firing, I would trim one with the least out of square neck and load it to see what happens, and load one bad case to compare to. Find some way to use a flat file and get as square as possible for this test.

Allen
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