I am using some IMR 4320 for my 6X45 which is about identical to Varget as far as burn rate but the powder grains are a tad smaller and fit into the case a little better than Varget. I still get a little crunch but not as much as the Varget.

Right now the 3 powders I'm going to do some testing with for 55-95 grain bullets in my 20" 1-9 twist BHW barrel is H335, H4895, and IMR4320 and I hope to have some results soon......if this arctic cold would ever decide to leave!

Funny that Accurate tells me that the AA2460 is too slow for the 6x45, but it's marginally slower than their own 2230. Makes me curious!!

How do you post pictures here?

You have to host them somewhere on the internet and make a link to them. The FAQ covers it.

Jack

I sent an email to Accurate about loads for the 6x4, here is their response:

We suggest the following.
Caliber: 6mm-223Rem/6mm x 45.
Barrel length: 20”
For 16” barrel reduce velocity by 5% to 6% ca 120 -150 Fps.
For 24” barrel increase velocity 3% to 4% 90 -110 Fps)
Powder: Accurate --- 2015®.
Bullet weight: 60 grains.
Start load: 23.5 grains (2600 – 2700 ft/p/sec)
Maximum load: 26.0 grains (2950 – 3050 Ft/p/sec). Full case/compressed.
Bullet weight: 70 grains.
Start load: 22.5 grains (2500 – 260 ft/p/sec)
Maximum load: 25.0 grains (2800 – 2900 Ft/p/sec). Full case/compressed.
Bullet weight: 75-80 grains.
Start load: 22.0 grains (2400 – 2500 ft/p/sec)
Maximum load: 24.5 grains (2700 – 2800 Ft/p/sec). Full case.
Bullet weight: 85 grains.
Start load: 21.6 grains (2300 – 2400 ft/p/sec)
Maximum load: 24.0 grains (2600 – 2700 Ft/p/sec). Full case.
Bullet weight: 95 grains.
Start load: 20.7 grains (2275 – 2375 ft/p/sec)
Maximum load: 23.0 grains (2500 – 2600 Ft/p/sec). Full case.
Bullet weight: 100 grains.
Start load: 20.0 grains (2225 – 2325 ft/p/sec)
Maximum load: 22.3 grains (2425 – 2525 Ft/p/sec). Full case.

Powder: Accurate --- 2230®.
Bullet weight: 55 grains.
Start load: 26.6 grains (2875 – 2975 ft/p/sec)
Maximum load: 29.5 grains (3250 – 3350 Ft/p/sec). Full case/compressed.
Bullet weight: 60 grains.
Start load: 26.1 grains (2800 – 2900 ft/p/sec)
Maximum load: 29.0 grains (3075 – 3175 Ft/p/sec). Full case/compressed.
Bullet weight: 70 grains.
Start load: 25.3 grains (2650 – 2750 ft/p/sec)
Maximum load: 28.0 grains (2900 – 3000 Ft/p/sec). Full case/compressed.
Bullet weight: 75-80 grains.
Start load: 24.3 grains (2550 – 2650 ft/p/sec)
Maximum load: 27.0 grains (2850 – 2950 Ft/p/sec). Full case/compressed.
Bullet weight: 85 grains.
Start load: 23.4 grains (2500 – 2600 ft/p/sec)
Maximum load: 26.0 grains (2700 – 2800 Ft/p/sec). Full case/compressed.
NOTES:
It’ important to note that SAFETY is our prime concern therefore we strongly recommend.
1. TO ALWAYS BEGIN LOADING AT THE RECOMMENDED MINIMUM “START” LOAD and develop loads in 2% increments towards the MAXIMUM load.
2. If at all possible, measure the velocity and correlate with our data.


Regards
Johan Loubser
Ballistician
Ramshot.Accurate Powders
Tel: 406.234.0422 email: johan@ramshot.com
WesternPowdersInc.Miles City.Montana.
COMPANY WEBSITES/PRODUCTS:
www.ramshot.com
www.accuratepowder.com
www.montanaxtreme.com
www.blackhorn209.com

Western Powders Inc. disclaims all possible liability for damages including, actual, incidental and consequential, resulting from usage of the information or advice contained in this message.
Use the data and advice at your own risk, and with extreme caution.
IMPORTANT NOTE: Allways begin loading from the minimum "START charge and carefully develop loads by increasing in small increments of 2% towards the Maximum load.
DISCLAIMER:
This communication is confidential and may be legally privileged. If you are not the intended recipient,
(i) please do not read or disclose to others, (ii) please notify the sender by reply mail, and (iii) please
delete this communication from your system. Failure to follow this process may be unlawful. Thank you for your cooperation

Great info!! Thanks.

After looking at A LOT of data, I'll try the 8208 for the 80 grainers and find some AA2200 or AA2015 for the 58 grainers.

Anyone trying LT-32? My local shop has a bunch of it.

Does anyone shoot the 80 blitz sierras? #1515 I think. I played with some today

Any reason that 6x45 load data is held to around 50k psi?

If loading for an AR 6x45 with 5.56 brass, a system with max avg SAAMI pressure spec of 62k psi, wouldn't one be able to safely approach similar pressure levels?

I imagine this would only be applicable if you have a Firearm chambered for 5.56 NATO, not 223 REM.

Here are the SAAMI Specs

Here is a good write-up about the difference

5.56 NATO vs. 223 REM

And what does any of this silliness have to do with a 6x45?

If you had a rifle with a 5.56 NATO chamber and a 6mm tube, then it most likely could be loaded to NATO pressures.
Given the fact that the 6x45 is based on a 223 Remington chamber, then the lower pressures are applicable.



Just because you are loading 5.56 brass does not mean your chamber can handle pressures of 62k psi.

How exactly does one get a chamber differing from the tube? Yours talking perfect nonsense.

There is no difference in 223 stamped and 5.56 designated brass. No more than any normal difference between manufactures and lots of brass. The only difference, sometimes, can be the leade between the 2. The 6x45 is nowhere considered in the 223/5.56 nonsense.

Strength of the components / barrel / bolt is what I was referring to. A 6x45 AR using 5.56 brass should be just as safe @ 62k psi as a 5.56 AR using 5.56 brass @ 62k psi.

The root of my curiousity came from studying 5.56 load data with max avg pressures around 60k vs. 6x45 data with max avg pressures around 50k. My assumption was 6x45 data was built around acceptable pressure for its"parent" case - .223 rather than its "step parent" case 5.56.