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Making 300 Blackout Brass From 5.56 Brass

MG1890MG1890 Member Posts: 4,460 ✭✭
edited January 2014 in Ask the Experts
How difficult? Anybody actually doing it? Which die set?
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Comments

  • D@DD@D Member Posts: 4,407
    edited November -1
    Have you seen this video? You might be able to make one.

    https://www.youtube.com/watch?v=LAGxcKI6XDc
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  • charliemeyer007charliemeyer007 Member Posts: 6,572 ✭✭✭
    edited November -1
    http://www.youtube.com/watch?v=jSLhwECrVnI

    I be happier if he tightened the locking nut on the sizing die de-capping stem.
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  • MobuckMobuck Member Posts: 14,171 ✭✭✭✭
    edited November -1
    Considering the cost of good .223 brass and the effort & tooling to do it right, I figure the cost of buying ready made well worthwhile. I could crank out some 300AAC with what I have sitting on my reloading bench(and I may use that venue to repurpose some over trimmed 223 cases) but the semi-commercially made brass is more consistent.
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  • claysclays Member Posts: 1,928 ✭✭✭✭
    edited November -1
    quote:Originally posted by MG1890
    How difficult? Anybody actually doing it? Which die set?

    Yes, I purchased a jig off E-bay that fits the Harbor Freight mini cut off saw. With a little tweaking, got it to cut them to a perfect length. I then use a Lee case length cutter mounted in a drill to insure all are the same length. Run them thru the die and they are ready to load. I prepared 500 cases in about 2 hours and have now loaned my cut off rig to several different people wanting to do the same.
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  • 62fuelie62fuelie Member Posts: 1,069 ✭✭✭
    edited November -1
    Just speculating, I'm sure someone can set me straight, I would think that when you cut that much off the length of the case you are going to need to anneal before you form the case and outside turn the necks for proper thickness to get uniform chambering.
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  • MobuckMobuck Member Posts: 14,171 ✭✭✭✭
    edited November -1
    "Just speculating, I'm sure someone can set me straight, I would think that when you cut that much off the length of the case you are going to need to anneal before you form the case and outside turn the necks for proper thickness to get uniform chambering."

    That would be the difference between "doing it" and doing it right.
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  • dfletcherdfletcher Member Posts: 8,179 ✭✭✭
    edited November -1
    quote:Originally posted by Mobuck
    "Just speculating, I'm sure someone can set me straight, I would think that when you cut that much off the length of the case you are going to need to anneal before you form the case and outside turn the necks for proper thickness to get uniform chambering."

    That would be the difference between "doing it" and doing it right.




    I can't speak to making them but I reload for 3 or 4 AAC rifles. I've noticed with cutdown brass the case neck thickness of the end product varies a fair amount. I can feel a distinct difference when seating - some case neck fits are tight as heck, others allow the bullet to slip in nice & easy. One of my rifles is a heavy barreled Remington 700, I'm leaning toward using "original" brass when shooting for accuracy.
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