What jig to use for making 300BLK from 223?

[nikdanja]

Heard mixed reviews on the squirrel daddy jig and how people had to really mod it out to make it work.

what do you guys use? Have nothing to do
During the winter so I mind as well save some cash and make my own 300BLK brass!

 

[x2cross]

I've been looking around for one as well, haven't found one that's a clear winner. The ZEP jig is another popular option. I might try to make my own by using a router to cut the shell slot in a piece of wood. Pretty much all the methods that use a chop saw are gonna require cleaning up the mouth with trim/chamfer/deburr tools anyway, so I won't be going for a perfect length trim.

I'm planning on getting the length close with a homemade jig, deburring, sizing, and then a final trim to length w/ chamfer & deburr.

 

[Bandit320]

I was thinking of using a Dremel cutoff wheel in a table drill press to get close then do the final trimmer to length with my lee case trimmer.

 

[Graye2]

I use the ZEP and the Harbor Freight chop saw. It’s an easy process and wouldn’t over think it. After rough cut I size and then use my Giraud trimmer to get to final length.

 

[NCHillbilly]

I use the zep and hb chop saw also, but to remove the rough burrs prior to sizing/shaping, I toss mine in the stainless steel media and tumble them for a few hours. Gets them clean, and cleans up the case mouth enough to allow sizing and final trimming.

 

[hic28]

I use the zep and hb chop saw also, but to remove the rough burrs prior to sizing/shaping, I toss mine in the stainless steel media and tumble them for a few hours. Gets them clean, and cleans up the case mouth enough to allow sizing and final trimming.

try sizing before cutting.

 

[MarinePMI]

Ummm...a $28 .221 Fireball form die anyone? One pass to make 221, with the excess protruding from the form die. One swipe with a hacksaw across the top of the hardened die to remove the excess. One pass to neck up to 300BO in a FL die. Trim, chamfer.

Not sure if you'll need to neck turn like a 300 Whisper...or if you'd need to anneal.

A lot of different ways to skin this cat.

 

[Winningdog]

I use the HF chop saw and built a jig using a cut off 223 brass. Work good.

 

[roostercogburn98]

HF mini chop saw and a jig I bought off eBay 10 years ago. Has made plenty and keeps going.

 

[MarinePMI]

I use the HF chop saw and built a jig using a cut off 223 brass. Work good.

Yeah, I built one too, about 20 years ago, when the 300 Whisper was popular and no one had even heard of a 300BO.

 

[Lone star Shooter]

I use a Harbor Freight mini chop saw and eyeball the cut at the top of the body of the .223 case. This leaves the cut case plenty long. Then I size and trim with a GSI International trim die and a Dillon RT-1200 trimmer.

I have found that I do not need the hassle of a jig with this setup.

 

[Romeo458]

I use this and an oscillating cutter followed by one of the crow trimmers.

Redding 300 Blackout (7.62x35mm) Trim & Form Die

Redding Trim and Form Dies allow you to file trim your cases without unnecessary resizing because they are made to chamber dimensions. Other...

www.midwayusa.com

 

[Blackcreek]

Might not be the cheapest route but look into a printers saw. Specifically a hammond glider saw. They where used to cut up lead type and can be very precise. I have a couple for other uses in my shop but I would bet they work perfectly for cutting cases down.

 

[vinniedelpino]

I was thinking of using a Dremel cutoff wheel in a table drill press to get close then do the final trimmer to length with my lee case trimmer.

I use a dremel as the cutoff tool in my DIY rig. It's basically a block of wood with a channel routed into it to hold the case and a screw to adjust the case length. The block rides inside of a channel cut into another block of wood that the dremel is attached to. With new cutoff wheels it works great. Cuts fast and very little trimming is needed.