Making a workable 300 Blackout brass jig is really pretty easy. It’s hard to make a super efficient one, but its easy to make a simple 300 Blackout jig that will help you get your brass cut to size, no problem. All you need are rubberized furniture pads, a vise or big clamp, and a grinder with a cutoff wheel. That’s it. It’s what I started with, and I’ve cut down hundreds, if not thousands of 556 brass into 300 Blackout with this simple jig. Assuming you’ve already got a grinder and a vise, the cost for this is about .25 for two furniture pad pieces (they do come in a big bag that costs a little more, but you can use the others for their original purpose- furniture.
If you’re looking to put together a jig for a little cut off saw, not a grinder, I honestly wouldn’t recommend trying to make it yourself. The effort and material involved make it easier and almost cheaper to just buy a professionally made option. They’re really not that expensive. If you turn your nose up at using a grinder, then you obviously just want the best product. The Zep reloading jig is the best product for this job. I’ve even found a decent deal on it as well, which you can go to if you scroll down. Otherwise, if you want the $.25 option, read on.
The Padding
I didn’t want the vise to disfigure my brass as it was clamping it. I’m trying to cut 300 Blackout to spec, so squishing it kind of hurts that goal. The padding is a foamy rubbery pad, designed to keep furniture from slipping. It has actually formed to the size of the the cartridge, so its pretty much a jig at this point. I don’t have to use the line at all at this point, but I still like having the line for a good secondary check to make sure I’m in the right spot. If you’ve got a vice, or a good clamp, you stick the pad in there to hold the brass, and you can just cut it off with a grinder and a cut off wheel. You just mark the length, and after you clamp the first one, you’ve got yourself a jig. It’s that easy.
Some of you might say, well technically, that’s not a jig. And you might be right, but the 300 Blackout cases I can cut with this set up don’t seem to mind. If you are interested in an actual jig for a cut off saw, here’s the information on it.
300 Blackout Brass Jig with a Little Cut Off Saw
Below is a really nice set up that I’m planning on duplicating. This guy uses the Zep Reloading jig, which is the industry standard for a 300 Blackout Cartridge jig. It’s really slick. I fought against getting one for the longest time and made due with my grinder, but this setup is so much quicker. Just watch this guy. If you’re looking to make something like this, you just can’t, and if you can, its not worth your time and money to do it. This jig really isn’t that expensive. If you plan to produce 300 Blackout brass at a high level, you’ll really want to consider picking one up.
Zep Reloading Jig
Cutoff Saw
This is a small cutoff saw that is mostly used for small things, like making 300 Blackout brass in a jig. It’s pretty much the same one used in the video above. It works perfectly for brass cutting and is the preferred method among people who home manufacture their own 300 AAC Blackout from 223 or 556 brass. Harbor Freight offers a cut off saw just like this one. If you’re looking for a bargain, Harbor Freight Chinese tools and Amazon Chinese tools are pretty similar both in price and quality. I’d bet these were even made in the same factory.
What Comes After I Cut It?
Well, after you cut it, you still need to trim it to exact size, deburr, chamfer, and go through the regular reloading process. I actually made a full article on how I Make 300 Blackout Brass, which you can read as well if you’d like.
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