Jump to content

Supersonic 300 Blackout bullet I designed


Recommended Posts

So I have been looking for, and trying, several lightweight bullets for the 300 Blackout. Almost everything that is off the shelf is designed for the 30 carbine which can be problematic when trying to feed it in an AR.

This led me to design another bullet for use in the 300 Blackout but this time for supersonic loads. This design may need to be cast out of harder alloys such as wheel weights and even then I would suggest water dropping. Even though there is a lube groove I would suggest powder coating or keeping the velocity down to normal levels if using conventional lubes. It is .309" because I plan on powder coating it and that generally adds .001" to the bullet's OD.

OAL should be in the 2.15" on the short side to 2.20" on the long side. It will weight 118 grains using wheel weight alloy.

 

NOE_Bullet_Moulds_309_118Gr_PT_118_gr_Sk

 

I am doing this for the same reason I designed the 31-240E and 31-225B. And that is to hopefully have a cast bullet that works with the 300 Blackout when no others out there will. And I suspect it will work in almost any other 30 caliber cartridge.

 

And if, when, this becomes available you will deal directly with the maker, not me, and order just like you would any other production mold he sells. I am doing this for the community and not for myself. I will not receive one red cent if someone buys this mold. He will need 15 orders to start making it a production item.

 

Right now just gauging interest as well as I would like to hear comments or concerns. Please feel free to ask questions or voice your concerns. We are here to help each other and make the 300 Blackout better.

 

  • Like 1
Link to comment

We are changing a few things. First the crimp groove is going and second we are adding a .050" meplat to the nose.

 

 

I think you'll get much better results out of the mold with that meplat.  Google the Lyman/Ideal 356402.  It would be the 9mm equivalent of what you're making here.  It just happens to be the boolit I run in my 9mm's now.  It's a wicked looking thing and shoots very well.  

 

Sure you want the plain base?  I'd be very interested to see if you get any skidding even with powder coating them after 1600-1800 FPS.  

 

I'll bet my hat these will shoot nice little clover leafs at 1500-1600 fps without powder coating them, provided you have a good fit.  

 

 

Looks great man.  

Link to comment

Ok, I figured out the OD for the loaded bullet at the internal magazine rib.

 

First lets look at the dimensions of the 223. On a 223 the rib rides between 1.55" and 1.75" and it has an OD of ~.253".

 

I split the difference and measured at 1.65" from the base for the new bullet design and the OD of the bullet at 1.65" is ~.18" when loaded to an OAL of 2.04". That is assuming the case length is 1.36" and the bullet it loaded flush with the top driving band. So the rib will not cause any interference problems. Even if you loaded the bullet extremely long it would probably not interfere with the internal rib of the magazine.

Link to comment
Bumping this up so those who might have missed it can see.

I will post how and where to buy it in a week or so.

And just to reiterate I get nothing when someone purchases a mold. The only thing I get is the ability to buy the mold myself. I requires 15 orders for production to begin and then it is a pretty short timeframe.
Link to comment

nice idea,looks great

 

 I  was just wondering would using a gas check be an option or does powder coating render them old school obsolete ?

 

I remember using some on really warm .357s years ago but "Dad just did it that way" but seems like a possible option to keep it all supersonic and maybe gain some FPS ..

Link to comment
  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

TRADING POST NOTICE

Before engaging in any transaction of goods or services on TGO, all parties involved must know and follow the local, state and Federal laws regarding those transactions.

TGO makes no claims, guarantees or assurances regarding any such transactions.

THE FINE PRINT

Tennessee Gun Owners (TNGunOwners.com) is the premier Community and Discussion Forum for gun owners, firearm enthusiasts, sportsmen and Second Amendment proponents in the state of Tennessee and surrounding region.

TNGunOwners.com (TGO) is a presentation of Enthusiast Productions. The TGO state flag logo and the TGO tri-hole "icon" logo are trademarks of Tennessee Gun Owners. The TGO logos and all content presented on this site may not be reproduced in any form without express written permission. The opinions expressed on TGO are those of their authors and do not necessarily reflect those of the site's owners or staff.

TNGunOwners.com (TGO) is not a lobbying organization and has no affiliation with any lobbying organizations.  Beware of scammers using the Tennessee Gun Owners name, purporting to be Pro-2A lobbying organizations!

×
×
  • Create New...

Important Information

By using this site, you agree to the following.
Terms of Use | Privacy Policy | Guidelines
 
We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.