Where the length of a batch of cases is well below the nominal case length for the cartridge, am I right in saying I should trim them to be a uniform length, even though this is well below the spec's?
The fuller story is that I'm loading for 6.5mm Creedmoor, starting with new Hornady brass, which has been once-fired in my rifle. Now that the cases have been fire-formed for the rifle's chamber, I want to tweek them to make the most of the rifle. As once-fired brass, I found measured case length varies between 1.900 and 1.915. Nominal case length for 6.5CM is 1.920; before trimming them all back to 1.900 I just wanted to make sure I'm not making an expensive mistake . . .
I also was thinking of batching them by case volume (water weight). I assume I should do this after I've trimmed them?
Thanks for any advice.
Triffid
Case trim length query
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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phaedra1106
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Re: Case trim length query
1.92 is the maximum case length not the nominal, SAAMI spec is for 1.92" +0" -.02" so trimming to 1.90 would be fine.
All of my current 6.5C cases are either reformed 308 RWS or 22-250 Rem, the 22-250 are all around 1.89/1.895 and work perfectly well. I did just pick up 100 once fired Hornady off another forum so I'll be checking them to see how they compare.
All of my current 6.5C cases are either reformed 308 RWS or 22-250 Rem, the 22-250 are all around 1.89/1.895 and work perfectly well. I did just pick up 100 once fired Hornady off another forum so I'll be checking them to see how they compare.
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