223 to 300 blackout case resizing & trimming

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cereal killer

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Who here reloads 300 blackout?

I'm currently reloading for other calibers but will start reloading 300 blackout due to price of ammo and the stash of free .223 brass I'm sitting on, but that means converting the cases from .223 to .300. I'm familiar with resizing and trimming, my questions are more geared towards finding a time & cost effective way to get it done.

So far I've identified 2 methods that would suit me:
1) resize die with powered trimmer - quick, easy, single operation, however expensive

2) pre-cut to approx length, regular full length size, then trim to exact spec - cheap, but takes a bit longer


What are you guys currently doing? Also, anyone know sources for a cheap chop saw to do the cutting? Seems to be plenty and cheap down in the US but seems to be a different story up here.
 
I picked up a mini chop saw from Princess Auto for under $100 and it works really well for cutting the cases down. I also picked up a Frankford Arsenal case trim and prep center which works well. Just make sure you are not using military brass to convert because the neck is too thick after conversion and will cause it to jam in the rifle.
 
spoc said:
I picked up a mini chop saw from Princess Auto for under $100 and it works really well for cutting the cases down. I also picked up a Frankford Arsenal case trim and prep center which works well. Just make sure you are not using military brass to convert because the neck is too thick after conversion and will cause it to jam in the rifle.
Click to expand...

I have Norc brass... think it will cause issues?
 
I use the chop saw method. I figured using a motorized case trimmer will probably dull out the cutter in a few hundred cases.

For now, I just use a clamped on block of wood as a chopping guide but I'm thinking of picking up a jig from these guys:

htt p://www.zepprecisionmachines.com/index.html

I've used Norc cases and they worked fine in my DD barrel. Pickup a Lee Factory Crimp die and run your loads through it as the final step.
 
I use method 2. Cut to approximate length on my Taig lathe, size and trim to length using Little Crow Gunworks' WFT.
 
I bought some factory ammo and also some LCA cut down cases while down south. I was thinking of getting the saw and jig on ebay as I have a lot of .223.
I am using 4227 powder, but would prefer to use some AA1680 if I can find it. CCI SRP, and 220gr Hornady RN. I use the PCV 50 beowoulf mags, as they have an generous opening at the front of the mag accomodate the big 220gr rn.
mine are about 1050fps.
 
Maurice. I have a subsonic load for 150gr bullets with 4227. Cycles and AR perfectly.

OP: I think option 2 is the most common method. Takes a bit longer but is cheaper to do.

With the work required to produce cases, the next most important thing is a good brass catcher. I can't say enough about the 3Bucc unit.
 
I use the princess auto chopsaw method and then debur before running them through the sizing die then final trim.
I made 700 pieces from Remington 223 brass and have had no problems at all.
H110 for lighter projectiles and A1680 and Lil'gun for medium to heavy projectiles and I found some 4227 I'll be trying soon.

I also have the 3bucc catcher and won't shoot without it.
 
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