Grendel finally delivered...

[Londerko]

[Arkhangel5]

Londerko is right. Hodgdon lists 28.5 of XBR as max for a 123gr bullet.

I think it is also in the Grendel reloading books, and has been mentioned quite a few times in different threads.

I have used that charge for the 123smk, 123 Amax, 123 eld-m and the 123 Nosler CC, all 4 bullets shot fine with no issues.

Just posted it as an FYI.

SY

[ricsmall]

^^What the last two posts said.^^28.5 is Max under any 123 grain with 8208. Most of my accuracy nodes are at 28.2-28.4. I’ve never had pressure problems with 8208, but I normally develop my loads in hot temps. Bill Alexander and the collective authors of the Grendel reloading books have put a few more downrange than Sierra. We plead for years for them to publish data before they actually did it.

[Bronsonburner]

I am with Cornbread. I would see if you can get to 28gr. If no pressure signs, am betting you will see the groups tighten back up.

The barrel will tell you what it likes, if higher doesn't shoot tight, there you go.

As an example, I am at 2465fps with 28gr of 8208, sub moa all day long, I think Cornbread is in the same ballpark(18in barrel).

Just an FYI.

SY

Hogdon lists 28.5 as max with a 123

^^What the last two posts said.^^28.5 is Max under any 123 grain with 8208. Most of my accuracy nodes are at 28.2-28.4. I’ve never had pressure problems with 8208, but I normally develop my loads in hot temps. Bill Alexander and the collective authors of the Grendel reloading books have put a few more downrange than Sierra. We plead for years for them to publish data before they actually did it.

Wow thanks for telling me this. For some reason I had it in my head that 27.5 was the max. It is according to Sierra data.

https://sierrabulletsblog.com/2017/11/16/sierra-bullets-6-5-grendel-load-data/

Now I'm REALLY pumped to go further.

[Mad Charlie]

BB:
As you may be aware, There are many variations in chambers in our Grendel's, therefore "go further" with caution and care please.

I have no problems with 28-28.2 8208 with 120gr in my rifles, but mine are not yours.

[trdjohn]

recently collected all my parts including 18" criterion MLGS, but just haven't had time to put them all together, so the OP targets are giving me some confidence going forward

[grendelnubi]

Lymans 50th edition list IMR 8208 for the 123 gr A-Max starting at 27.3 and max at 28.5. I have not been able to get over 28 due to ejector marks.

[Cornbread]