Home CMMG Subsonic 6.5 Creedmoor Effectiveness in the CMMG Mk3 DTR2

Subsonic 6.5 Creedmoor Effectiveness in the CMMG Mk3 DTR2

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Can a subsonic 6.5 Creedmoor round produce enough energy to cause real damage? Do Speer Hot-Cor bullets even expand at those low speeds? Discover the answers in this quick test!

Equipment used in this video:
1. CMMG Mk3 DTR2 AR-10 in 6.5 Creedmoor
2. Bushnell HDMR-II rifle scope:
3. Weaver Picatinny Rings 34mm:
4. UTG Recon Flex Bipod (M-Lok):
5. UTG Recon Flex Bipod (Keymod):
6. Champion AR500 Pop-Up Target:

Moving out at a mere 1,050 feet per second, my subsonic 6.5 Creedmoor handloads use Hodgdon Trail Boss power and a magnum primer to launch a 140-grain flat-base spire-point bullet from Speer. I chose these bullets for their stability at low speeds. In the last test, where we shot heavy .308 subsonics, the energy was a bit less than a .357 Magnum at 509 ft-lbs. These 6.5mm projectiles only produce 343 ft-lbs of energy, roughly the same as 9mm Luger. Consider the sleeker profile and soft tip of the Hot-Cor bullet, and you have a round that can retain its energy for a few hundred yards and then bloom into a wide cutting tool on impact. This could be an excellent tool for quietly dispatching destructive pests like the coyote that’s been eating your chickens. In this test the core of our subsonic round penetrated roughly 18 inches of water and kept going, shedding its jacket in the third water jug.

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Kyle Broderick, The Social Regressive

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10 COMMENTS

  1. I simply enjoy your presentation and demeanour. I have more personal interest in your scope reviews and long range shooting. Still, i find myself watching your other videos because you come across as genuine and somehow different than most other gun reviewers on youtube. More like an old friend than someone who has something to prove or an axe to grind.

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