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    Perfect head space and separating case heads

    The unfired factory rounds seems to be perfectly in spec in my case gauge
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    Perfect head space and separating case heads

    First of all thanks for the info I'll definitely get a comparator and use that method in the future. But that still doesn't explain why factory ammo would be stretching. Factory ammo stretching points to the head space being a little out of spec and the go, no go gauges definitely point to the...
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    Perfect head space and separating case heads

    I'll definitely pick one up! I had a smith check the headspace with both go and no go gauges and the bolt closed smooth on the go gauge and wouldn't close at all on the no go gauge. I'm relatively sure the headspace on the rifle itself isn't the issue. I could try that method anyway though...
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    Perfect head space and separating case heads

    I set up the sizing die by running the ram up and screwing the die down until it touched the ram and then backed it off a half turn. I sized a piece of brass and checked it in the case gauge, and screwed the die down until the case fit in the gauge. I'm using the lyman single caliber ammo...
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    Perfect head space and separating case heads

    I'm assuming the marks aren't superficial since as I went up on the charge they actually started separating. I use a lyman case gauge to check every round after full length sizing and the rounds fired with Varget didn't fit in the case gauge. I didn't check the factory brass but it wasn't much...
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    Perfect head space and separating case heads

    Stuck a paper clip down and couldn't feel a crack. I have cut one of the cases from the Varget test open with a band saw and could see a definite thinning of the brass by the mark.
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    Perfect head space and separating case heads

    I recently bought a savage 10T in 308 from Cabelas as an intro long range rifle. I also just started reloading and have been having relatively good luck until just recently. I started working up a load with 168 gr Amax's and Varget when I started getting case head separations out of the blue (no...