450 factory ammo unburned powder

Talk about the AR15 style rifles chambered in 450 Bushmaster.

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450 factory ammo unburned powder

Postby Akoperator01 » Wed Dec 09, 2020 6:21 am

I would like to say hello to all on the forum I have read quiet a bit about unburned powder from different issues reloading , but I haven't got to reloading yet just been shooting Federal 450 Bushmaster 300gr power shok. After shooting just a few rounds there is a lot of what looks like unburned powder residue inside barrel. Has anyone else had this issue or do I have a problem?
I am shooting my on build it's 20 inch factory bushmaster barrel, AR style rifle.
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Re: 450 factory ammo unburned powder

Postby s4s4u » Wed Dec 09, 2020 10:05 am

I assure you, it is burned. If you scrape it up and put a match to it, it's not gonna flare up. It is just residue, some leave more than others.
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Re: 450 factory ammo unburned powder

Postby Hoot » Wed Dec 09, 2020 11:16 am

s4s4u wrote:I assure you, it is burned. If you scrape it up and put a match to it, it's not gonna flare up. It is just residue, some leave more than others.



VV N110 pushing 200gr FTX bullets left residue not only in my bore but downrange in my optical chrony.

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Re: 450 factory ammo unburned powder

Postby Al in Mi » Wed Dec 09, 2020 12:25 pm

welcome aboard.

pretty normal to have residual powder left in the bore with factory or handloads. I see it in all my straightwall rifles.
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Re: 450 factory ammo unburned powder

Postby Akoperator01 » Wed Dec 09, 2020 2:04 pm

I haven't tried scraping any out and seeing if it would burn. I was just going by appearance in barrel looks like flakes.
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Re: 450 factory ammo unburned powder

Postby s4s4u » Wed Dec 09, 2020 9:16 pm

Akoperator01 wrote:I haven't tried scraping any out and seeing if it would burn. I was just going by appearance in barrel looks like flakes.


If you think there is a lot of it left in your barrel, spread a white bedsheet out in front of your bench when you shoot....
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Re: 450 factory ammo unburned powder

Postby Hoot » Wed Dec 09, 2020 10:58 pm

s4s4u wrote:If you think there is a lot of it left in your barrel, spread a white bedsheet out in front of your bench when you shoot....


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Re: 450 factory ammo unburned powder

Postby Akoperator01 » Thu Dec 10, 2020 6:00 am

Ok thanks guys I appreciate all advice . I had never shot an large bore straight wall guns before never realized they would have so much residue in barrel so quick after 8-10 shots. I was just worried more that could cause gas system issues fairly quick.
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Re: 450 factory ammo unburned powder

Postby s4s4u » Fri Dec 11, 2020 8:42 pm

Akoperator01 wrote:Ok thanks guys I appreciate all advice . I had never shot an large bore straight wall guns before never realized they would have so much residue in barrel so quick after 8-10 shots. I was just worried more that could cause gas system issues fairly quick.


I've had a lot of different factory ammo in various chamberings shoot dirty, especially 9mm. When you handload you can control some of that with powder choice. I don't buy ammo unless I have no alternative.
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