reloading 300 AC blackout

[wvsturgeon]

Relatively new so will run this by the community. I purchased once fired 300 AC blackout brass from the MIssouri Bullet Company.
Unfortuantely, I reloaded 12 of the brass with 225 bullets, 11.8 grain CFE powder but never re-sized the BRASS. Though the once fired brass looks brand new, it should have been resized. Should I take them apart and resize the 12 or are they ok to use?

Thanks for your input

 

[M-61]

but never re-sized the primers

?

 

[DShortt]

Relatively new so will run this by the community. I purchased once fired 300 AC blackout brass from the MIssouri Bullet Company.
Unfortuantely, I reloaded 12 of the brass with 225 bullets, 11.8 grain CFE powder but never re-sized the primers. Though the once fired brass looks brand new, it should have been resized. Should I take them apart and resize the 12 or are they ok to use?

Thanks for your input

Two questions. First, what do you mean by never resized the primers?

Second, assuming you reprimed the cases do they chamber without problems? If it's an AR platform I'd not let the bolt fly shut with a case in there or you might jam it in tight and then you'll have a real problem to remove it safely.

 

[M-61]

Two questions. First, what do you mean by never resized the primers?

Second, assuming you reprimed the cases do they chamber without problems? If it's an AR platform I'd not let the bolt fly shut with a case in there or you might jam it in tight and then you'll have a real problem to remove it safely.

I’ll let it sit until clarification is provided to my post #2 otherwise I have no idea what’s being asked.

 

[6Creed73]

I'm guessing you meant you didn't resize the fired brass.

If this is an AR platform, it's vital to size them and I'd recommend a short base die. For a bolt gun, if this wasn't fired in your gun, then those rounds are likely garbage. Either way, take them apart and size the brass.

Do you have a case gauge? If so, does the round fit in the gauge?

 

[DShortt]

I'm guessing he didn't even reprime the brass but unless more information is provided this is nothing but conjecture.

 

[6Creed73]

I'm guessing he didn't even reprime the brass but unless more information is provided this is nothing but conjecture.

Agreed, we need more info. But if he didn't reprime then how did he drop a powder charge? My take on his post is the brass looked new so he didn't size it, then found out later that he should have.

 

[DShortt]

Agreed, we need more info. But if he didn't reprime then how did he drop a powder charge? My take on his post is the brass looked new so he didn't size it, then found out later that he should have.

I don't know either except it was once fired brass. Perhaps they cleaned it but didn't deprime it?
Only guess I've got for 'never re-sized the primers'.

 

[wvsturgeon]

?

Sorry about the confusion, I meant re-sized the brass.

 

[wvsturgeon]

I’ll let it sit until clarification is provided to my post #2 otherwise I have no idea what’s being asked.

Sorry about the confusion, I meant re-sized the brass.

 

[wvsturgeon]

I don't know either except it was once fired brass. Perhaps they cleaned it but didn't deprime it?
Only guess I've got for 'never re-sized the primers'.

That is my bad, sorry about the confusion, I meant re-sized the brass.

 

[wvsturgeon]

I corrected my post. Sorry to all about the confusion. I meant re-sized the brass.
thank you all for your patience.

 

[DShortt]

OK, well it largely depends on if it will chamber and extract then. Try single loading one and if that works then load up a mag and check them all. If they all chamber and extract without issue you're fine.
I would FLS everything else just to be safe though.

 

[dellet]

If it’s an AR, pull the upper and bolt, insert the loaded round into the chamber with finger pressure, hold it muzzle up, the round should drop out on its own.

You can do the same with a bolt action, it’s just a bit more awkward.

If there is a sizing problem, it will tap out with a cleaning rod, verse needing to pound it out by closing the action on it.

If the primers were missing, and the bullet had to be pressed into the neck, then that brass was cleaned and sized for sale, so you should be fine.

It’s always good practice to size and check trim length of any brass shipped bulk, even new. The necks and mouths can be crushed, and most sellers don’t check length.

 

[wvsturgeon]

If it’s an AR, pull the upper and bolt, insert the loaded round into the chamber with finger pressure, hold it muzzle up, the round should drop out on its own.

You can do the same with a bolt action, it’s just a bit more awkward.

If there is a sizing problem, it will tap out with a cleaning rod, verse needing to pound it out by closing the action on it.

If the primers were missing, and the bullet had to be pressed into the neck, then that brass was cleaned and sized for sale, so you should be fine.

It’s always good practice to size and check trim length of any brass shipped bulk, even new. The necks and mouths can be crushed, and most sellers don’t check length.

Dellet,

The primers were missing in the Missouri Bullet Company's 300 AAC Blackout Brass. To play safe, I took my reloaded brass (the ones that I had not initially re-sized) all apart, including the primers, carefully, and re-sized the brass. Then I went through all the steps to reload the brass properly. Lesson learned-probably true that the company already had re-sized them but now I know to always check the trim length and re-size the brass.

Thanks for your good advice.