2206H Compressed Load .223

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2206H Compressed Load .223

Post by Gaznazdiak » 16 Nov 2018, 1:36 pm

I have just started loading some Berger 70gr VLD with 24gr of 2206H in once fired ADI brass.
I haven't loaded these for some time and have the short term memory of a goldfish for important things (I can rember stupid jokes well enough :roll: )

I have only loaded 3 and all 3 gave a little crunch, presumably compressing the charge. I don't recall this from before.

The bullet is seated 20 thou from the lands so there's FA wriggle room.

Before I load any more of them up and find pressure signs, does anyone know if 24gr of 2206H behind a 70gr pill is likely to be an issue?
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Re: 2206H Compressed Load .223

Post by Member-Deleted » 16 Nov 2018, 1:56 pm

Gaz,
i occasionally use Speer 70 grain SP in ADI brass. One of the more accurate loads i worked up was 24.8gr of 2206H, out of a Howa 24" varmint barrel. no signs of pressure. 23.0 was the most accurate though.
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Re: 2206H Compressed Load .223

Post by bigfellascott » 16 Nov 2018, 1:59 pm

This is the info from ADI website (use at your own descression)

70 GR. Speer Soft Point, Spitzer, Spire Point
AR2206H .224" 2.140"
23.0 grain 2782 fps 40400 cup
25.0 grain 2997 fps 50500 cup
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Re: 2206H Compressed Load .223

Post by Cooper » 16 Nov 2018, 1:59 pm

Once fired brass from your gun? Have you fill length sized the brass? Is it ADI or OSA? I know you said ADI. I know it is pretty much the same thing. But difference batches could be different.

The only reason I ask. Is bought some Australia once fired brass (OSA )(full length sized with a small base die) and noticed that my load was nearly compressed compared to once fired brass from my rifle.

Probably nothing wrong with a compressed load. But I would probably test it before loading a heap up if you can?
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Re: 2206H Compressed Load .223

Post by Gaznazdiak » 16 Nov 2018, 2:03 pm

Member-Deleted wrote:Gaz,
i occasionally use Speer 70 grain SP in ADI brass. One of the more accurate loads i worked up was 24.8gr of 2206H, out of a Howa 24" varmint barrel. no signs of pressure. 23.0 was the most accurate though.


Ok, thanks for that.

I didn't want to have to pull them apart. As mine is also a Howa with a 24" fluted varmint we should be fairly close.

I might fire those 3 as a test group and 3 at 23 before I load any more.
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Re: 2206H Compressed Load .223

Post by Wm.Traynor » 16 Nov 2018, 2:07 pm

Before dealing with the compressed load, I think the charge weight should be addressed. If you have not worked up to it yet, then you should. What once worked in my rifle years ago, is no guide. That goes for any other 223 on Earth.
A compressed load won't hurt you. I've done it many times and the ADI Guide has tested them. Just work up, if for no other reason than you might be using reduced internal volume cases. ADI brass was always heavy and the extra brass reduced capacity, theoretically increasing pressure. This might no longer be the case, NPI ;) so you might be OK. But you might not :unknown: Compare the internal volume with another make if you have some lying round :thumbsup:
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Re: 2206H Compressed Load .223

Post by Gaznazdiak » 16 Nov 2018, 2:21 pm

ADI stamped brass fired from another Howa 1500 as , if I recall correctly, Buffalo River factory ammo.

I put ten of the 85 empties in and cycled the bolt without issue, so didn't bother to buy a FL die and decided to just fireform them.

I loaded some Nosler 70gr RDF last week with the same charge of 24gr and there was no apparent compression. The Bergers do have a longer boat tail, but are only 0.1mm longer overall. :unknown:

PS, yes Wm, worked up to that last year and, like a dumbarse, lost the file in my memo app with the various loads and groups. I was initially at 25gr but that was cratering primers, 24gr was the next most accurate that didn't.
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Re: 2206H Compressed Load .223

Post by Strikey » 16 Nov 2018, 6:05 pm

Most loads in the 223 with the heavier projectiles and either 2206H or 2208 are going to be compressed, there's not a lot of room in that case. The primer cratering is common with Howas as they seem to have a bit more clearance around the firing pin, mine was cratering and piercing primers until I changed to CCI BR4's, these primers have a thicker cup, interestingly my Weatherby 223 has not had any cratering issues :thumbsup:
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Re: 2206H Compressed Load .223

Post by SCJ429 » 16 Nov 2018, 6:32 pm

You shouldn't be experiencing a compressed load with 24 grains unless the projectile is seated way into the case. Try a bit of tapping on the bench before you seat the pill.
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Re: 2206H Compressed Load .223

Post by Gaznazdiak » 16 Nov 2018, 7:10 pm

Good news is, 23gr had all three touching at 100 and was just very marginally better than 24, although the 23 were horizontal and the 24 were vertical, no idea what that signifies.
Also, no pressure sign on the CCI BR4s at 24gr, so all good.
Thanks for the responses :drinks:
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Re: 2206H Compressed Load .223

Post by TassieTiger » 16 Nov 2018, 8:44 pm

I’ve worked up to 26gn 2206h in my steyr - it tack drives 60gn hornady amax with this charge - when I shake case, I cannot hear any spare air and there is a small crunch when seating bullet.
I started at 23.5 up and 24 was okay, 25gns was a bit weird and 26 was all holes touching. From memory - one of the 3 books I have, stated 25.5 of ar2206h was non compressed and on the high end of conservatism.
24gns behind 55’s is my favourite...
I have a 1:9 so should be really looking at heavier projectiles but when you see your last shot disappear into the hole of your previous shot - it’s hard to move away.
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