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300 blk

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  #15  
Unread 06-03-2011, 04:32 PM
Silver Member
 
Join Date: Sep 2008
Location: Las Cruces, NM
Posts: 156
Re: 300 blk

Thanks Lou. It looks like a decent round, the only drawback is its a wildcat. I am through with non-factory rounds. It's just not cost effective in my eyes.

I am still looking.
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  •   #16  
    Unread 06-04-2011, 09:58 AM
    Gold Member
     
    Join Date: Oct 2007
    Location: Patagonia Mountains, Arizona
    Posts: 770
    Re: 300 blk

    Here's a comparison of the ballistics of a 220 grain SMK fired from a 300 BLK and a 30-06. I used the 30-06 instead of a 308 because a 220SMK won't comfortably fit in a 308 short action rifle.. They do fit nicely in a 30-06 in a Rem 700 long action. Conditions are standard metro.

    Cartridge ---------------- 300 BLK-----------------30-06
    Rifle ----------------------- AR-15 -------------------Rem 700 LA
    bullet-----------------------220SMK-----------------220SMK
    Barrel-----------------------16 in --------------------22 in
    MV---------------------------1025 fps*--------------2425 fps **
    Velocity @ 100------------990 fps----------------2291f ps
    Velocity @ 400------------908 fps ---------------1914 fps
    Energy @100-------------479 ft-lb---------------2566 ft-lb
    energy @ 400------------402 ft-lb----------------1790 ft lb
    10mph wind @100------0.9 in--------------------0.6 in
    10mph wind @400-----13.81in-----------------10.6 in
    drop @ 100 ---------------16.9 in ------------------3.1 in
    drop @ 400 --------------289.3 in-----------------55.1 in

    * 1025 is not max but about optimum for stable subsonic performance
    ** 2425 is about a 90% max load with H4350 powder.

    What's better? That depends on what you're trying to accomplish.

    Last edited by LouBoyd; 06-04-2011 at 10:21 AM.
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      #17  
    Unread 07-06-2011, 07:51 PM
    Junior Member
     
    Join Date: Apr 2010
    Posts: 11
    Re: 300 blk

    Here is the first official load data:

    SilencerTalk • View topic - Western Powders 300 AAC BLACKOUT reloading data:
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