300 BO brass question

[FROGO207]

Got a new to me pistol in 300 BO recently and dies are on the way! Have been digesting all the 300 BO reloading threads on here. Factory ammo was $3 a round for what I purchased (SIG) so reloading has got to be beter LOL. Here's a pix. My question is am I really going to have to neck turn all the converted 223 brass that I have or are there some brands that are thin enough to use as is?

 

[AJC1]

Got a new to me pistol in 300 BO recently and dies are on the way! Have been digesting all the 300 BO reloading threads on here. Factory ammo was $3 a round for what I purchased (SIG) so reloading has got to be beter LOL. Here's a pix. My question is am I really going to have to neck turn all the converted 223 brass that I have or are there some brands that are thin enough to use as is?View attachment 1109366

There is a list of those that do and dont..don't... I don't have that list.

 

[FROGO207]

Thought I had seen that. Thanks, I shall try to find the list again. Got about 3 five gallon buckets of 223 so I must have some of about everything in there.

 

[markr6754]

Please reference this "official" list from the 300 Blackout forum

STICKY - Good/Bad brass list converting 5.56->300blk -300BlkTalk

Check your converted brass with a tube micrometer. Necks should be .013" and below, with .013" sometimes iffy. Check in multiple places for consistency.

 

[AK Hunter]

Here is the thicknesses of case necks of factory production 223/5.56 brass.

 

[mcb]

Unless you're swimming in 223/556 brass and just want to convert it I would just buy new 300 BO brass or find a couple Remington Freedom buckets of 300 BO (~$1/rd) and get your brass that way.

 

[EricBu]

Got a new to me pistol in 300 BO recently and dies are on the way! Have been digesting all the 300 BO reloading threads on here. Factory ammo was $3 a round for what I purchased (SIG) so reloading has got to be beter LOL. Here's a pix. My question is am I really going to have to neck turn all the converted 223 brass that I have or are there some brands that are thin enough to use as is?View attachment 1109366

Well, I've converted probably 10K pieces of brass. 90% mil surplus, mix of LC and WMA mostly IIRC, the rest various civilian headstamps. I've never neck turned a single one. If any needed it, they made it through the entire process without me noticing, and case gauged fine, as well as fired fine. I do remember in the early days of 300 BLK, there was some brass that was listed as nogo to convert on some of the older 300 BLK forums, but I don't recall ever ending up with any.

 

[Walkalong]

Please reference this "official" list from the 300 Blackout forum

STICKY - Good/Bad brass list converting 5.56->300blk -300BlkTalk

Check your converted brass with a tube micrometer. Necks should be .013" and below, with .013" sometimes iffy. Check in multiple places for consistency.

That's what I did (.012 and under), even though the fat ones would work in my chamber, but I just scrapped the fat ones.

 

[Lennyjoe]

Only brass I’ve used for my .300 BO brass conversion were LC13 since I have thousands of those laying around. That was when the .300 BO first came out and brass was not as plentiful on the market as it is now.

Since then I just buy new or used brass online and retired the cutting wheel and sizing stuff.

 

[dgod]

Here is a site I use, great company…


http://sagesreloadingsupply.com/

 

[kcofohio]

Thought I had seen that. Thanks, I shall try to find the list again. Got about 3 five gallon buckets of 223 so I must have some of about everything in there.

When I 1st started converting 223s to 300 Blk, I did a couple hundred, not caring what the headstamp was. The ones I loaded all chambered fine. Then I got a Lyman's case gage. It was like half of them wouldn't pass the gage. It's all in the neck that fail. If I get another 300, they may or may not chamber. So now I go by the .012" wall thickness. Those do pass in the gage.

 

[AJC1]

That's basically half the beauty of this cartridge, free brass and cast bullets. It is literally the recycle gun.

 

[Gone Hiking]

Since .223/5.56 Federal brass has a reputation for splitting necks and it has thin walls, I set aside all my Federal range brass to convert to .300 Blk. It's a great way to use less desirable, but abundant .233/5.56 brass for favorable .300 Blk brass. Win-win. I don't neck turn anything. Powder coated lead bullets are very affordable, too. Even cheaper if you cast.

 

[CoalCrackerAl]

Im slowly accumulating 300 BO brass. Future rifle purchase? Or i'll pass them on.

 

[AJC1]

Im slowly accumulating 300 BO brass. Future rifle purchase? Or i'll pass them on.

I can't seem to help myself from building a small stash either. If I pick up 300bo no conversion nessary.

 

[TEXASJD]

Only issue I ran into making it was split necks when I did not anneal it, after first firings

 

[jmorris]

I got into the round when a friend asked if I could build a machine for them to cut military blanks, so they could form them into 300 blk and final trim.



They paid well for the intellectual property of the final product but I don’t mind sharing the test mule for the blades I rigged up.

 

[markr6754]

I don't neck turn anything.

Unfortunately for me, my starting budget was bigger than my brain...so I threw money at any problem I encountered as a new reloader without any local mentor to advise me. I made the "investment" into the Hornady Case Neck Turning Tool. It's really a nice setup, but also rather expensive. On a case saved basis I'm probably down to $4.78/case. By that I mean I paid $118 for the tool and I've neck trimmed about 25 cases...saving these range pickup 5.56mm cases from the scrap heap. Yeah, great idea...but totally wasted on me. Far too much once fired brass available to spend more time and effort turning case necks.

 

[Click_Here]

Just standardize on 2-3 from the "good list" someone posted above. PMC (large font) and LC(any) are what I sort out for 300 BO brass, plentiful. I did try many others from the good list and didnt have a problem either. I simply put the ones on the bad list aside for .223. Might as well use the data kindfully made available.

 

[FROGO207]

Thanks all for the helpful info. Let the sorting begin LOL.

 

[cfullgraf]

I got involved with 300 Blackout when it was new. At the time, commercially available cases were few and far between.

I formed a bunch of 223 Rem cases to 300 Blackout without issues in the case neck but it is worth checking. I have not had to ream any case necks of cases that I formed.

Off hand, I do not remember what head stamps that I converted but they were commonly available domestic brands.

Forming 300 Blackout cases is not difficult, just an expenditure of some time.

 

[Lennyjoe]

https://capitalcartridge.com/fully-processed-300-blackout-rifle-brass-250pcs/

 

[EricBu]

https://capitalcartridge.com/fully-processed-300-blackout-rifle-brass-250pcs/

And at nearly .30 ea, that's why we convert our own. And what's even more hilarious is that BRAND NEW STARLINE 300 BLK is a penny ea cheaper than this reman brass AND THE STARLINE SHIPS FOR FREE.

Just saying, there's a reason why folks convert their own...5.56 brass can be had for almost nothing, even free a lot of the time. Then it only costs a little time and effort to convert.

 

[AJC1]

And at nearly .30 ea, that's why we convert our own. And what's even more hilarious is that BRAND NEW STARLINE 300 BLK is a penny ea cheaper than this reman brass AND THE STARLINE SHIPS FOR FREE.

Just saying, there's a reason why folks convert their own...5.56 brass can be had for almost nothing, even free a lot of the time. Then it only costs a little time and effort to convert.

Exactly

 

[Soonerpesek]

Just saying, there's a reason why folks convert their own...5.56 brass can be had for almost nothing, even free a lot of the time. Then it only costs a little time and effort to convert.

Once you convert the .223 brass to .300 Blk, then it is fired, can it be reloaded again or is it one and done..?