trimming neck too short: implications?


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twofifty
January 27, 2013, 10:19 PM
I've trimmed one bottleneck rifle case 8 thou shorter than the manual's
1.902" trim-to length. This case is on it's fourth reload; the neck sized properly and will tightly hold/retain a bullet at its seated depth.

Wondering if there likely is enough neck length left to assure full obturation of gases/pressure?

Sure I could turf it, but the obturation question would remain.

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Walkalong
January 27, 2013, 10:21 PM
You'll be fine, and it will stretch to length soon enough.

hovercat
January 27, 2013, 10:40 PM
Just keep the overall length when loaded with bullet. Now, if the cartridge headspaces on the case mouth instead of the shoulder, rim or magnum belt, it could cause a problem. Given the length, I assume a bottleneck case. Just do not want someone thinking that a 45 ACP or 9mm is ok in the same case.

twofifty
January 27, 2013, 10:46 PM
Yes it is a bottleneck case.

Thanks for pointing out the safety implications wrt too-short cases that are designed to headspace on the mouth.

helotaxi
January 28, 2013, 12:35 AM
You should still be above SAAMI min case length.

gamestalker
January 28, 2013, 03:28 AM
You'll be just fine, and you won't even notice any difference if any exists. I once inadvertantly trimmed some .270 win. .010" or .012" shorter than minimum SAAMI spec. and couldn't decern the difference on paper, or chronograph.

GS

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