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.
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.
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.
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.
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.
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.