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small-base Grendel
#6
Don't bother. The brass absolutely sucks and the suck@ss brass in the rebated case head can't handle the bolt thrust. I'm able to push a 75 grain vld target at 2900 fps with 1/2 MOA or better accuracy and single digit sd out of my 18" Odin barrel. No pressure signs on the primer

[ATTACH=CONFIG]9396[/ATTACH]

But one out of four case heads gets completely abused.

[ATTACH=CONFIG]9397[/ATTACH]

As you can see, the bolt is unlocking and turning and the extractor is literally tearing and bending the rim. This is with 27 gr of XBR in a case with more capacity than Grendel and a 75 gr bullet.....

That load goes transonic at around 1100 in my parts and subsonic around 1250. But I'm probably relegating the build to being a 223 +P equivalent where I'm doing a 70 gr RDF at 2850. the brass can handle that load so I guess I'll just use up the brass I have, wear out the barrel and see if Nosler has improved the brass when the time comes. If not, I'll probably end up doing a wildcat

JA, if Nosler had designed it for longer bullets, it would have been at the expense of case capacity and hence velocity. They chose the velocity route....


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Messages In This Thread
small-base Grendel - by just_john - 04-03-2017, 11:28 AM
small-base Grendel - by A5BLASTER - 04-03-2017, 12:03 PM
small-base Grendel - by LRRPF52 - 04-03-2017, 05:12 PM
small-base Grendel - by bj139 - 07-12-2017, 01:15 PM
small-base Grendel - by JASmith - 07-12-2017, 02:20 PM
small-base Grendel - by StoneHendge - 07-12-2017, 06:07 PM
small-base Grendel - by Kilco - 07-12-2017, 06:37 PM
small-base Grendel - by StoneHendge - 07-12-2017, 10:12 PM
small-base Grendel - by Longtubeman - 07-18-2017, 07:38 PM
small-base Grendel - by AWS - 10-11-2017, 07:18 PM

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