Reloading question need advice

17remhunter

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Joined
Nov 12, 2025
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220
New Peterson brass every case was perfectly uniform in weight and length. After the first firing I measured the case length. Instead of the case stretching a little it was shorter by .015. Every case. Is this normal. The cases were 6 mm Creedmoor

Second question I have some new 17 Remington Nosler brass all prepped. I did nothing to the new cases just loaded them up with my standard load. They would chamber but i could not drop the bolt handle. I chambered a new unloaded case same thing. Could it be that the shoulders are a tad bit to forward and need to be bumped back or should I FL size each case? I have no issues with new Norma brass
 

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