Reloading For An AR-10 In 6.5mm Creedmoor LMT MWS

[Fire4Effect]

Mine is a DPMS LR in 260 REM, but the damage to the cases was not due to the cases hitting the rifle on ejection. The extractor grooves were damaged . A friend with several of the same rifles as mine, in 243 WIN sent me to JPs page and after seeing how well the 123 or 130s worked I never looked back at the 140s. I don't know but I think it's a fire, extraction timing thing, I thought making the140s to work well could be solved, it just wasn't worth the time and energy. YMMV, good luck with it and keep us posted.

I have been reloading 308 and 223 for 50 years and it was only in 2020 that I started looking into 6.5 Creedmoor when I picked up a 6.5 Creedmoor barrel for my LMT MWS. I only shot with that barrel twice in 2020 and I commented on Snipers Hide about my experience. I also purchased a Tikka T3TAC A1 in 2021 that I still have not shot

https://www.snipershide.com/shooting/threads/lmt-mws-brt-eztune-gas-tube.7032995/

Back in 2020 I had planned to start reloading for 6.5 Creedmoor and I purchased what was at the time the go to bullet and powder. COVD and major health issues sidelined me from moving forward with reloading for 6.5 Creedmoor until recently. As time and my health permits, I plan to shoot both the LMT MWS and Tikka T3TAC A1 in 6.5 Creedmoor.

From everything I am reading here and on Snipers Hide, what I have reloaded so far would be fine for my Tikka T3TAC A1. For the LMT MWS my starting loads will be fine, but the higher grain loads may be too warm. I am also getting the impression that 140 gr bullets with H 4350 presents significant challenges for a gas gun platform and 130 gr bullets and a different powder would be more fulfilling.

I am open to trying 130 gr bullets with a different powder. Can anyone recommend a 6.5mm 130 gr bullet and powder combination for AR-10 platform?

 

[C.O. Shooter]

As of now, I am at 41.5 grains of H4350, and the Berger 140 VLD Hunting in my AR10.

 

[Old Navy]

I have been reloading 308 and 223 for 50 years and it was only in 2020 that I started looking into 6.5 Creedmoor when I picked up a 6.5 Creedmoor barrel for my LMT MWS. I only shot with that barrel twice in 2020 and I commented on Snipers Hide about my experience. I also purchased a Tikka T3TAC A1 in 2021 that I still have not shot

https://www.snipershide.com/shooting/threads/lmt-mws-brt-eztune-gas-tube.7032995/

Back in 2020 I had planned to start reloading for 6.5 Creedmoor and I purchased what was at the time the go to bullet and powder. COVD and major health issues sidelined me from moving forward with reloading for 6.5 Creedmoor until recently. As time and my health permits, I plan to shoot both the LMT MWS and Tikka T3TAC A1 in 6.5 Creedmoor.

From everything I am reading here and on Snipers Hide, what I have reloaded so far would be fine for my Tikka T3TAC A1. For the LMT MWS my starting loads will be fine, but the higher grain loads may be too warm. I am also getting the impression that 140 gr bullets with H 4350 presents significant challenges for a gas gun platform and 130 gr bullets and a different powder would be more fulfilling.

I am open to trying 130 gr bullets with a different powder. Can anyone recommend a 6.5mm 130 gr bullet and powder combination for AR-10 platform?

I shot a lot of really good groups in my Aero with the Berger 130 AR Hybrid over 39 grains of Varget.

 

[Fire4Effect]

I made it up to our rifle range on New Year’s Eve and recorded good results for the 6.5 Creedmoor reloads with 140 gr and 147 gr Hornady EDLM bullets. The ejected brass looked fine except for the slight denting on some of the necks which is normal for an AR. I did not see any pressure signs with any of the 140 gr EDLM loads and some slight pressure signs with the max 147 gr EDLM loads.

I measured all my fired cases with a Whidden headspace gauge and all measured +4.5 (0.0045”), except for the 147 gr EDLM with 41.2 gr of H4350. That was a max load and it measured +5 (0.005”).

My Winchester WLR primers are 35 years old and they have performed fine with my 308 loads and I did not experience any issues with the 6.5 Creedmoor loads. I have a few targets where I have a nice 4 shot group, but the fifth shot opens it up. Not sure if this was my shooting or some other factor is in play. I will repeat these loads the next time I go to the range and fire more five shot groups to obtain a larger sample.

I have not shot any of my loads with the new Lapua Small Rifle Primer Pocket brass. They are already loaded, but someone here mentioned I should reduce the loads by 1 grain.

 

[Bc'z]

Tagging in....
I gotta gasmoor, or less coming for tuning next week.

 

[Bc'z]

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