Making 300blk brass

Leadslinger444

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Does anyone have experience making 300blk brass from ivi or military brass?

Whats a good tool to trim the inside if the casing?

Thanks
 
I just use Norinco brass. Cut with mini-chopsaw, run through RCBS dies then trim and chamfer with LEE quick trim. That's my method. Some NATO brass may need to have the neck turned and it's enough work you will want to avoid it. You won't know until you make some and try it in your gun with whatever bullet you choose.
 
I use to but I bought 300BLKOUT cases in bulk from Black Steep and I have never bothered since. Its work intensive, and requires some form of automatic annealer. If you were doing them individually with tupac annealing marker it would take a long, long time to make a 1000 ready to go cases.

Candocad.
 
I use to but I bought 300BLKOUT cases in bulk from Black Steep and I have never bothered since. Its work intensive, and requires some form of automatic annealer. If you were doing them individually with tupac annealing marker it would take a long, long time to make a 1000 ready to go cases.

Candocad.

I do 100 in an hour. Once they are made they last quite a long time with subs and long enough with supers. I don't know why you think they need to be annealed, they don't.

Buying factory brass could be an option if there were any to buy... I started making my own because I couldn't find any brass that wasn't horribly overpriced. That really has nothing to do with the OP anyway...
 
I do 100 in an hour. Once they are made they last quite a long time with subs and long enough with supers. I don't know why you think they need to be annealed, they don't.

Buying factory brass could be an option if there were any to buy... I started making my own because I couldn't find any brass that wasn't horribly overpriced. That really has nothing to do with the OP anyway...

I know a lot of guys don't but I anneal all my brass (not just because I have a Vertex bench source), but I found it also really helped on consistent neck tensioning. I see that Black Sheep only now sells in really large volumes, I bought a couple of thousand years back and I am still working my way through them.

Candocad.
 
You can/could buy a jig off of Amazon, that clamps onto the mini chop saws, for cutting down 223 brass to make into 300blk. Well worth the $20.
 
You can/could buy a jig off of Amazon, that clamps onto the mini chop saws, for cutting down 223 brass to make into 300blk. Well worth the $20.

I don't get the point of the jigs, why not just set the guide? That's all I do and it works fine. The length is set when you trim so it only needs to be close.
 
I don't get the point of the jigs, why not just set the guide? That's all I do and it works fine. The length is set when you trim so it only needs to be close.

To convert the brass you have to trim off app 3/8 of in a inch. very time consuming if you are using a hand trimmer
 
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