Could a 300 BLK can handle low pressure 223Rem

Good Day All. I have a GMT-300BLK can that I’ve owned for a few years and have shot lots of supers and subs out of it. I was reviewing subsonic 223 loads to consider if I stayed on the low end of the load charts, would the pressure hurt the can. The load I am considering uses Hodgdon BL-C(2) and lists 41,900 PSI. I would of course use the correct upper and have the thread adapter as well.

Has anyone done this through a “dedicated” 300BLK can?

Thank you all for the anticipated responses, even if they do come in somewhat colorful.

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@Tactical_Reviews I believe has pics

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Sounds like your concern is muzzle pressure that would enter the can. I don’t suspect that will be an issue. The 300 blackout is a heavier bullet, but slower velocity. The .223 round will have a bit more space around it as it passes through the baffles.

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Maybe @SuppressedNation_Chris or @SuppressedNationJoey can help

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Shouldn’t be a problem. If you load low pressure rounds for 223 the gun probably won’t cycle.

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Thank you

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That is along the lines of what I was thinking, but a man has to know his limitations. Thank you for the info, now I am going to work up a few rounds and see how it performs.

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Thanks

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I really like their reviews

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I would say subsonic 223 would be completely safe in it. I’ll shoot a message to two of the guys that worked at gemtech that probably abused a can or two to see what it can actually handle. I’ll let you know or see if I can get them over here to respond.

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Chris that would be awesome and thank you for the effort. I thought about 55gr, then realized that 77gr would be better.

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You want heavy grain 223subs that cycle check out allegiance ammo. I’ll see if I can get them on this thread as well

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Wow, thanks again. I am headed to the range now with my daughter, but only plan to shoot some 300 and maybe some 9mm. I am looking forward to working up some ammo now.

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I must be missing something.
Fire a .223 round through a .30 caliber barrel?
A 300 blackout is .30 caliber, yes?

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A can

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From Blake the guy who designed the gm300

“The answer is yes. But if it gets hot and they slip in supers it will bend the core”

Hope this helps

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Good Afternoon All. I apologize for the late response, but I was out at the range for a few hours.

I know that 223 will transit the 30 cal can, but I was wondering if the pressure would negatively impact the core. I see that Chris received an answer from Blake and I am good to go now.

Thank you to everyone and I will come back with an update after I’ve worked out the load and tested it.

I just had the gas port on my rifle adjusted and I am going back out to the range.

Have a great day.

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Better than a note from your Dr. :grin:

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Once you get that load data please post video

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I almost puked after reading that. I swear that is where I was. If I am lying; may my trigger finger fall off.:innocent:

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