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I've gathered some great info on loading for the 6.8 SPC II from this forum and this will be my first contribution as I am relatively new to the 6.8 cartridge.


I can offer my results hand loading for the Six8 A5 14.5" with pinned flash hider. Tested barnes 85gr, speer 90gr TNT and Gold Dot, barnes 95gr, speer 100gr, hornady 110gr bthp, hornady 120gr SST, hornady 130gr SST. All these with different powders including: aa2200, h322 and RL7

The Six8 1:10 twist barrel prefers lighter projectiles like the barnes 85gr and speer 90gr TNT or Gold Dot. I have not yet done any testing with different COAL.

Recently built an upper for the Six8 with 12.5" ARP 5r 1:11.25 twist barrel. This ARP barrel prefers heavier projectiles 110gr and 120gr. The lighter projectiles did not do as well in this ARP barrel as they did with the 1:10 twist lwrc barrel (new ARP barrel and may need to work up a proper load using 85gr/90gr projectiles). The heavier projectiles did not do as well in the lwrc 1:10 twist barrel.

My take away is to stick with barnes 85gr or speer 90gr for the lwrc barrel and hornady 110gr or 120gr for the ARP barrel.

Below are some of the better groups I've managed to get out of the Six8 lwrc 1:10 twist barrel.

Hope this helps!!

61066


61067


61068


61069
 

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Discussion Starter #22 (Edited)
UPDATE!

Well, the reloading gear arrived. The range opened up. I learned how to use my Chrono. :)

I loaded up 20 rounds with H322, 115gr SMK. I loaded a 2 grain range with .1 gr increments. After looking at that data, I decided to make 5 rounds of 10 different charge weights to see how they'd do.

My goal was to find something that improved my ugly issue of 5-6 MOA, hopefully something better than 1.75 MOA. .7 MOA makes me so happy. I don't need to sell this, or melt it into paper weights.

115 gr Sierra MK
28.1 gr H322
COAL 2.290
CCI BR4

2425 avg fps. SD 9.45 fps, ES 24.92 fps.

Ballistic-X-Export-2020-06-21 16:53:10.836895.PNG

Anyhow, only you guys probably appreciate the way conquering an issue like this might feel after 2 years.

I don't think I'll buy another LWRC, but it isn't because they're not good rifles. The challenge of swapping out barrels just isn't worth it.

Time to go load some A2200's for next weekend.

MB
 

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Discussion Starter #23
I've gathered some great info on loading for the 6.8 SPC II from this forum and this will be my first contribution as I am relatively new to the 6.8 cartridge.


I can offer my results hand loading for the Six8 A5 14.5" with pinned flash hider. Tested barnes 85gr, speer 90gr TNT and Gold Dot, barnes 95gr, speer 100gr, hornady 110gr bthp, hornady 120gr SST, hornady 130gr SST. All these with different powders including: aa2200, h322 and RL7

The Six8 1:10 twist barrel prefers lighter projectiles like the barnes 85gr and speer 90gr TNT or Gold Dot. I have not yet done any testing with different COAL.

Recently built an upper for the Six8 with 12.5" ARP 5r 1:11.25 twist barrel. This ARP barrel prefers heavier projectiles 110gr and 120gr. The lighter projectiles did not do as well in this ARP barrel as they did with the 1:10 twist lwrc barrel (new ARP barrel and may need to work up a proper load using 85gr/90gr projectiles). The heavier projectiles did not do as well in the lwrc 1:10 twist barrel.

My take away is to stick with barnes 85gr or speer 90gr for the lwrc barrel and hornady 110gr or 120gr for the ARP barrel.

Below are some of the better groups I've managed to get out of the Six8 lwrc 1:10 twist barrel.

Hope this helps!!

View attachment 61066

View attachment 61067

View attachment 61068

View attachment 61069
It does! I bought a bunch of Barnes 85 gr and 95 gr. I cant wait to give all these a try. :)
 
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