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 --- 2015ฎ.
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 --- 2230ฎ.
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.
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