Reloading 556 vs 300 BO shared dies

[Saddleback]

Hey all,
Hornady has a rebate for free bullets. I'm looking at a 2 die 223 set on Midway from them. I understand I'll need to buy the shell holder. My question is what is shared (if anything besides the shell holder) if I am reloading 300 BO from my 223 / 556 brass. Will anything from this 2 die set be used for reloading 300 BO?
Thanks, Saddleback

[mshill]

Nope, just the shell holder. 300bo has it's own set of die.

[Saddleback]

Nope, just the shell holder. 300bo has it's own set of die.

Thanks

[JagerDog]

You'll also have to cut the .223 brass down, trim etc.

Depending on volume, it might be better to just buy 300BO brass. 1X is like 20 cents.

[mshill]

You'll also have to cut the .223 brass down, trim etc.

Depending on volume, it might be better to just buy 300BO brass. 1X is like 20 cents.

Since I trim all of my once fired factory brass anyway, the cutting for 300bo from 556 is a single very easy step. The trimming with a Worlds Finest Trimmer makes the process rather painless.

[JagerDog]

Since I trim all of my once fired factory brass anyway, the cutting for 300bo from 556 is a single very easy step. The trimming with a Worlds Finest Trimmer makes the process rather painless.

I think there's more involved than OP was imagining.

That OP wondered if the dies were compatible supports that conclusion.

https://www.youtube.com/watch?v=2FRIJZnxsWw

[McGuiver]

Reloading 556 vs 300 BO shared dies

I like converting 5.56 or .223 brass. When I was machining for a living, I would not have enjoyed it, but now yes.

My slow method. Stick 5.56 brass into forming die (Redding form and trim die on press. Old 5.56 shoulder is squeezed down into the 300 AAC neck.



Now trim with hand saw.



Once cut, file flat.



Remove brass and deburr ID (inside diameter) and OD (outside diameter).

Left over cut off scrap parts. Goes into brass bin.



Sample of brass ran thru form & trim die, but not cut. Waiting on chop saw.




Sample of stages to form and trim.



Top piece 5.56 brass (once fired).

Middle piece formed in form and trim die.

Bottom piece converted to 300 AAC brass.

Here is what the 300 AAC form and trim die is.

https://www.midwayusa.com/product/390120/redding-trim-and-form-die

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[edgerly779]

Barbaric way to do it I cheated I took a soft jaw collet and opened it up to base diameter of .223 and use le=athe with cut off tool and case mouth chamfer tool in tailstock to clean up. I used to make my own .44 automag from .308 brass the same.

[Bumslie]

A guy on cast boolits mass produces blackout brass.

500 for 66 shipped.

1000 for 120 shipped

http://castboolits.gunloads.com/showthread.php?t=311965

RIP Blitzburgh

[Saddleback]

I like converting 5.56 or .223 brass. When I was machining for a living, I would not have enjoyed it, but now yes.

My slow method. Stick 5.56 brass into forming die (Redding form and trim die on press. Old 5.56 shoulder is squeezed down into the 300 AAC neck.

Amazing, can't thank you enough for the great pics and walk through. I've got a lot more 556 to shoot then I do 300 BO, so I'll likely be using the 556 for 300. I'm in no rush, just soaking up all I can.

[McGuiver]

Reloading 556 vs 300 BO shared dies

Amazing, can't thank you enough for the great pics and walk through. I've got a lot more 556 to shoot then I do 300 BO, so I'll likely be using the 556 for 300. I'm in no rush, just soaking up all I can.

I have to take a lot of pictures for work documenting secret squirrel stuff. I just get used to taking pictures. I know they help. Glad it helped you.

I don't remember who I talked to, but they had a Redding 300 AAC form and trim die, and swore by it for forming cases. I ended up picking on up and love it too. Sometimes I only have enough time to do 10 or 20 cases a night, but they add up quickly.

I think just about every avid reloader has a bucket of 5.56 or .233 brass laying around. I never hesitate to pick it up. It is worth money in the end as scrap brass, after it has had a useful life.


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[Saddleback]

A guy on cast boolits mass produces blackout brass.

500 for 66 shipped.

1000 for 120 shipped

http://castboolits.gunloads.com/showthread.php?t=311965

RIP Blitzburgh

That is a good deal. I almost bought some for .18 /1 off midway.

[mshill]

Just be aware that some .223/5.56 cases have thicker walls and when the projectile is pressed in the neck will be too thick to chamber. The headstamp I know I have problems with is PPU. Here's the list:

https://thefiringline.com/forums/showthread.php?t=554449

I started only loading 300 bo in perfecta .223 brass cause I have a lot of it and I'm starting to want more consistency from my more expensive loads.