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.223 - 300 Blackout Brass Processing - What do I need?


Maximis228

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I went and shot a bunch of 220 gr subsonic 300 Blackout and now im hooked. I load pistol ammo at a fairly high rate as of now (60+K a year on a MK7). Used to load 223 on a single stage before getting my 1050s but as of now I just load pistol. I have nothing for Rifle for a progressive press outside of a set of dies. There is so much information on here and some of it seems to be conflicting from my searches.

 

Do I trim in 1 pass or 2? Do I use Dillon's toolhead or the GSI one? Is there better options available. What stations do I set up what in? Do I need to anneal? If so What method?

 

What do I need to get to Convert 223 to 300 BLK on a 1050?

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I do mine on my 650

dillon rt-1500 trimmer

toolhead for 300blk

dillon carbide trim die. 

Universal decap die in station one

run it through to prep once. 

Swage primer pockets

run it through to load.

 

do large batches. 

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I’m on a Mk7 650.
I’m using the titan trimmer adapter with the Bosch router. (Google Titan trimmer, or honey badger trimmer)
I’ve had issues with it, mainly related to the large amount of brass swarf. The chips would get sucked in to the front bearing of the motor and cause excessive heat.
I made a shield and added 2 more vacuum ports. Seems to have fixed it.
The brass chips are long and stringy and get wrapped around the end mill causing excessive amp draw and if they didn’t clear before the next brass goes in, it would trip the electrical breaker. The stringy chips also get caught in the corrugated vacuum hose, I’ve since made the hose out of 1 1/2” pvc pipe. Haven’t made any brass since that mod, but if anything it will be easier to clean out the giant chunks of stringy brass.
I have also switched to the fast and friendly brass boring bar. Instead of the end mill,
The insert has a chip breaker, so the consensus is that it breaks up the stringy brass better. Haven’t cut any amount of brass with it yet, so can comment on the effectiveness.
You will need the short trim
Tool head. Carbide trim die.

I do a universal decap. Trim/size, in 1 toolhead.
M die, powder, MBF, seat, crimp in the other.

Also not all brass works, I’ve found wolf, herters, do some weird belling in the M die
Almost like an hourglass shape. GFL brass won’t chamber in 2 guns I’ve tried. They were both ballistic advantage barrels though.

I just stick to LC brass now. It’s the easiest to swage in the 650 with a swage it.




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You need 2 passes on the 1050.

 

Trim pass:

Decap, swage, trim, regular 300blackout sizing die to fine tune headspace. I use the second die to avoid having to change the trimmer setting very often. It's easier to use the 2nd die to me. You'll need the GSI or a milled/short toolhead, trimmer (Dillon or one of the router based ones), trim die, expander die.

 

Load pass:

decap to remove media from flash hole, lyman m die, powder, bullet drop, seat, crimp (if you want to crimp).

 

setting the MBF up for long subsonic bullets, looks to require some extra work in devising a guide for the bullet flip. Lots of videos out there with examples.

Edited by DWFAN
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Oh yeah.. the Mr bulletfeeder.. it seems the dropper assembly is a pretty tight tolerance to the .308 diameter. When using coated Bullets sized to .310 some would get stuck.
Had to modify the dropper assembly to work as well. It’s been a lot of work to get everything to run properly.


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The good news is.. 300blk doesn't grow much, so once you form it if the initial trim is short enough you won't ever need to trim again.

 

If you get most of your brass back after shooting, it's probably easier to buy 2-3k already processed than to tool up to make it yourself.

Edited by DWFAN
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  • 1 year later...
On 3/19/2018 at 6:16 PM, cvincent said:

I’ve had issues with it, mainly related to the large amount of brass swarf. The chips would get sucked in to the front bearing of the motor and cause excessive heat.
I made a shield and added 2 more vacuum ports. Seems to have fixed it.
The brass chips are long and stringy and get wrapped around the end mill causing excessive amp draw and if they didn’t clear before the next brass goes in, it would trip the electrical breaker. The stringy chips also get caught in the corrugated vacuum hose, I’ve since made the hose out of 1 1/2” pvc pipe. Haven’t made any brass since that mod, but if anything it will be easier to clean out the giant chunks of stringy brass.
I have also switched to the fast and friendly brass boring bar. Instead of the end mill,
The insert has a chip breaker, so the consensus is that it breaks up the stringy brass better. Haven’t cut any amount of brass with it yet, so can comment on the effectiveness.
You will need the short trim
Tool head. Carbide trim die.

 

Im having the same issue with brass being pulled up into the router (Currently using a carbide cutter bit, have a boring bar on order) and causing excessive heat quickly. Tot he point ive had to take the unit apart and clean it out after only 100 cases. I know the carbide bit isnt helping as it kinda pulls the swarf up and away VS out and away like a boring bar might.

 

You mention a shield you have built. What does this look like?

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Im having the same issue with brass being pulled up into the router (Currently using a carbide cutter bit, have a boring bar on order) and causing excessive heat quickly. Tot he point ive had to take the unit apart and clean it out after only 100 cases. I know the carbide bit isnt helping as it kinda pulls the swarf up and away VS out and away like a boring bar might.
 
You mention a shield you have built. What does this look like?



I used a piece of Kydex, slip it on the router shaft and the OD should fit snuggly but not too snuggly in the ID of the router adapter.

2425a3759db88438a039efbf8bd15e6f.jpg

e48022be505b9b97112631f31e130087.jpg


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11 minutes ago, cvincent said:

 

 


I used a piece of Kydex, slip it on the router shaft and the OD should fit snuggly but not too snuggly in the ID of the router adapter.

2425a3759db88438a039efbf8bd15e6f.jpg

e48022be505b9b97112631f31e130087.jpg


Sent from my iPhone using Tapatalk

 

 

 

I appreciate the photos. Thank you sir.

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