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Posted: 12/28/2014 9:45:24 PM EDT
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Okay, I've got a pretty good bit of LC 5.56 brass that I've been saving up. I ordered a this 300 Blk barrel from Brownells.
I want to go ahead and prep and convert my brass. I'm planning on using a Harbor Freight chopsaw and this trim jig. I then want to deprime, trim, and tumble my brass before sizing and final trim with either a Harbor Freight rotary or vibratory tumbler. I am thinking of using a single stage press with a universal decapping die, and priming with a hand primer. Then once the brass is prepped and primed, using a turret press and this die set. It looks like I would have to modify the sizing die to prevent depriming my freshly primed brass. What constructive criticism can you guys offer? Do I have to use #41 CCI primers in an AR, or can I use regular small rifle primers? Thanks folks. |
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Quoted:
What constructive criticism can you guys offer? Do I have to use #41 CCI primers in an AR, or can I use regular small rifle primers? Thanks folks. I have loaded and shot 30k+ rounds of 223, 6x45, 300 Blackout and 222Rem all in AR platforms and I have never used #41 primers. I have mostly used Winchester, CCI 400 and Remington 7 1/2 small rifle primers. |
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Just to add, since you're using LC brass, you will also want a wat to remove the primer pocket crimps. Either swagging or cutting out the crimp or else you won't be able to seat the new primers. The "modifying" of the sizing die to not deprime can be done by removing the depriming pin, or simply leave it there and resize and deprime in one step.
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Quoted: Okay, I've got a pretty good bit of LC 5.56 brass that I've been saving up. I ordered a this 300 Blk barrel from Brownells. I want to go ahead and prep and convert my brass. I'm planning on using a Harbor Freight chopsaw and this trim jig. I then want to deprime, trim, and tumble my brass before sizing and final trim with either a Harbor Freight rotary or vibratory tumbler. I am thinking of using a single stage press with a universal decapping die, and priming with a hand primer. Then once the brass is prepped and primed, using a turret press and this die set. It looks like I would have to modify the sizing die to prevent depriming my freshly primed brass. What constructive criticism can you guys offer? Do I have to use #41 CCI primers in an AR, or can I use regular small rifle primers? Thanks folks. Be sure to * debur cases before forming the shoulders. See the scratches on the neck? Caused from debris build up in die because I didn't debur. * As I progressed in this caliber, I found annealing the case before forming the shoulder to have accuracy benefits. This is my present case forming process. Good luck |
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Tools you mentioned will work. I use a bandsaw I already had to cut down cases. Be sure to * debur cases before forming the shoulders. <a href="http://s250.photobucket.com/user/dryflash3/media/300%20Blk/PB280300.jpg.html" target="_blank">http://i250.photobucket.com/albums/gg272/dryflash3/300%20Blk/PB280300.jpg</a> See the scratches on the neck? Caused from debris build up in die because I didn't debur. * As I progressed in this caliber, I found annealing the case before forming the shoulder to have accuracy benefits. <a href="http://s250.photobucket.com/user/dryflash3/media/Moved%20Pics/bd1bb344-e39f-410e-89c9-76182d1dd110_zps94ee9acc.jpg.html" target="_blank">http://i250.photobucket.com/albums/gg272/dryflash3/Moved%20Pics/bd1bb344-e39f-410e-89c9-76182d1dd110_zps94ee9acc.jpg</a> This is my present case forming process. Good luck Quoted:
Quoted:
snip Thanks folks. Be sure to * debur cases before forming the shoulders. <a href="http://s250.photobucket.com/user/dryflash3/media/300%20Blk/PB280300.jpg.html" target="_blank">http://i250.photobucket.com/albums/gg272/dryflash3/300%20Blk/PB280300.jpg</a> See the scratches on the neck? Caused from debris build up in die because I didn't debur. * As I progressed in this caliber, I found annealing the case before forming the shoulder to have accuracy benefits. <a href="http://s250.photobucket.com/user/dryflash3/media/Moved%20Pics/bd1bb344-e39f-410e-89c9-76182d1dd110_zps94ee9acc.jpg.html" target="_blank">http://i250.photobucket.com/albums/gg272/dryflash3/Moved%20Pics/bd1bb344-e39f-410e-89c9-76182d1dd110_zps94ee9acc.jpg</a> This is my present case forming process. Good luck Thanks for the heads up on deburring. I haven't put much though into annealing, I did watch a few vids on youtube, but I wasn't sure whether or not it was something I was going to delve into. |
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Quoted: Thanks for the heads up on deburring. I haven't put much though into annealing, I did watch a few vids on youtube, but I wasn't sure whether or not it was something I was going to delve into. Quoted: Quoted: Quoted: snip Thanks folks. Thanks for the heads up on deburring. I haven't put much though into annealing, I did watch a few vids on youtube, but I wasn't sure whether or not it was something I was going to delve into. Two ways to go. $500 annealing machine, or basic tools.  My basic tools. The Tempiliq is a must have. http://www.midwayusa.com/product/988733/tempilaq-temperature-indicator-750-degree-2-oz  Spot of Tempilaq is placed inside neck, let dry. Place case in socket turned by a battery powdered screwdriver. Heat neck with torch while case is turning. Watch for spot of Tempilaq as it comes around, when it melts (about 3-4 seconds) drop case in metal pan. Done, let case cool. Without Tempilaq you will overheat the case. BTDT, then got some Tempilaq and started getting professional results.
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Using the HF saw with jig, I never noticed any need to deburr before sizing. I will be sure to keep an eye on it. Next time I cut I will compare my cuts to Dryflash's pic. I don't recall mine being that rough.
Oh.. and baby steps... Don't worry about annealing till you get the rest of the process down. Edit: RE: primers... 7 1/2's or 41's are best. Everyone will tell you other brands are fine. Winchesters WERE good but they changed within the last few years. Not the same thickness metal. I don't trust them.My friend has had a bunch of blown primers with 400's and refuses to change to 41's for AR's. I use similar recipes (well below max) and have had no issues. I say spend the extra penny. |
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