rjrivero
01-11-2011, 07:56 AM
I've been exploring this section of the forum. My dilemma is this:
I'm in knee deep in a 300 AAC BLACKOUT project. I've got dies, I've formed some 200 pieces of brass. I've been researching loads. However, the cost for reloading subsonic rounds is pretty steep. The 220gr Sierra OTM are like $.35 each.
I was referred to castboolits.com where they have a group buy going on for a mould specific for the 300 BLK. It's a 247gr flat tip that is designed so the lube grooves are within the case neck, and the ogive is the right size to index on the "ribs" in the AR magazine that originally index on the .223 case neck to keep the rounds strait in the double feed magazine.
The only drawback is that I will need a specialty suppressor for shooting cast boolits suppressed. (How many suppressors is too many, anyway? ;))
So the big picture scheme of things: Cast boolits, short barrel upper, and suppressor that is end user serviceable.
The only "hurdle" in this is the casting. I will probably ONLY shoot these bullets at 1050 FPS. So, I need to know a couple things about casting. I need to know what alloy to use to get started. Wheel weights aren't readily accessable. They need to be recycled to a LICENSED recycler, per the folks who work at the local tire places. (bummer)
I can buy ingots online, so the price is still better per boolit than the Match Grade Sierras.
What alloy would be best for this application? What lube would be best for this application?
Should I get the mould for these boolits plain base or with a gas check? Will a gas check even HELP at these low pressures and velocities? Some folks suggest gas checks at this low pressure could cause increased leading, since the pressure isn't enough to deform and expand the hard copper of the gas check.
If you have a resource for me, maybe a print form book, I would appreciate it greatly.
If you have any thoughts on my particular situation, I would appreciate that perhaps even more!
Thanks in advance.
RJ
I'm in knee deep in a 300 AAC BLACKOUT project. I've got dies, I've formed some 200 pieces of brass. I've been researching loads. However, the cost for reloading subsonic rounds is pretty steep. The 220gr Sierra OTM are like $.35 each.
I was referred to castboolits.com where they have a group buy going on for a mould specific for the 300 BLK. It's a 247gr flat tip that is designed so the lube grooves are within the case neck, and the ogive is the right size to index on the "ribs" in the AR magazine that originally index on the .223 case neck to keep the rounds strait in the double feed magazine.
The only drawback is that I will need a specialty suppressor for shooting cast boolits suppressed. (How many suppressors is too many, anyway? ;))
So the big picture scheme of things: Cast boolits, short barrel upper, and suppressor that is end user serviceable.
The only "hurdle" in this is the casting. I will probably ONLY shoot these bullets at 1050 FPS. So, I need to know a couple things about casting. I need to know what alloy to use to get started. Wheel weights aren't readily accessable. They need to be recycled to a LICENSED recycler, per the folks who work at the local tire places. (bummer)
I can buy ingots online, so the price is still better per boolit than the Match Grade Sierras.
What alloy would be best for this application? What lube would be best for this application?
Should I get the mould for these boolits plain base or with a gas check? Will a gas check even HELP at these low pressures and velocities? Some folks suggest gas checks at this low pressure could cause increased leading, since the pressure isn't enough to deform and expand the hard copper of the gas check.
If you have a resource for me, maybe a print form book, I would appreciate it greatly.
If you have any thoughts on my particular situation, I would appreciate that perhaps even more!
Thanks in advance.
RJ