David Reiss
posted this
27 February 2022
I have been forming .22 Jet brass from .357s for many years. The previous suggestion about annealing the cases is correct. Without doing so you will continue to get those dents. They are not caused by too much lube, but just the stress on forming the cases without annealing. I suggest you use a lube like imperial lube when sizing. Slow and easy with the forming as you said, it really helps to reduce case stress and loss.
Once sized in a .22 Jet FL die, use a low pressure load to fire form them. I can also add that even after full pressure loads those stress dents will still be present. I just toss those as ,357 brass is plentiful.
David Reiss - NRA Life Member & PSC Range Member Retired Police Firearms Instructor/Armorer
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