Page 1 of 4 123 ... LastLast
Results 1 to 10 of 42

Thread: Is a 7.5" Barrel Viable?

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Jun 2015
    Location
    Georgia
    Posts
    3,105
    Feedback Score
    2 (100%)

    Is a 7.5" Barrel Viable?

    So as the title asks, is a 7.5" barrel viable? I was involved in a discussion on a small forum I frequent, and one of the posters seemed to think so. I know what I've read here that a 10.5" barrel is really the minimum viable length, and tried to explain that terminal ballistics suffer dramatically below that length. I explained that rifle wounding is based on hydrostatic shock, and that once you lose that much velocity, you may as well be using a PCC.

    His response was that he was getting 2300 fps with Barnes 60 grain TSX bullets, and that they expand down to 1800 fps, and that hits at 100 yards were easy. Doesn't this just bolster my comparison to a PCC?

    Would any of you kindly educate me a bit further, please?

  2. #2
    Join Date
    Apr 2020
    Posts
    120
    Feedback Score
    1 (100%)
    I did a bunch of reading up on this too. What I came up with is that it is viable as a very short range tool. With modern ammo that does its work at lower velocities, it should work. It won't be ideal though. I stayed with a 11.3 because of the muzzle blast and reliability over a broad range of ammo types.

  3. #3
    Join Date
    Dec 2013
    Posts
    84
    Feedback Score
    0
    Well, if by viable you mean would I want to get hit by a bullet coming out of a 7.5" barrel, then yes, sure they are viable. But you are absolutely giving up a lot of velocity, and with it potential terminal performance and, IMHO getting almost nothing back in return. I owned a 7.5" upper for a while, but rarely shot it and eventually sold it. At that length you are getting a huge fireball out the end of the barrel. Also, you end up having to put your support hand almost against the receiver. I'm not someone who does that whole "C clamp" thing with my support hand, but having to put your support hand that far back is just not ideal.

    To me, if you are going the SBR route, a barrel between 10.5" and 12" is the ideal. Still very short, maneuverable and light, yet you maintain decent velocity. Or you could just switch to 300 BO and get even better ballistics.

  4. #4
    Join Date
    Dec 2015
    Location
    Former USA
    Posts
    3,144
    Feedback Score
    0
    Viable for a small niche. Discrete carry, break contact type weapon system. That’s what they’re for.
    You won't outvote the corruption.
    Sic Semper Tyrannis

  5. #5
    Join Date
    Jun 2015
    Location
    Georgia
    Posts
    3,105
    Feedback Score
    2 (100%)
    Quote Originally Posted by prepare View Post
    Viable for a small niche. Discrete carry, break contact type weapon system. That’s what they’re for.
    I think this is really it's niche, right here. But the question I have is why would this be any better than a PCC?

  6. #6
    Join Date
    Nov 2013
    Posts
    462
    Feedback Score
    8 (100%)
    There is a youtube channel that I subscribe to, the guy is former LEO and worked in the industry blah blah. But he swears by the 7.5 for vehicle stuff due to the over all size, but I really can't behind the whole thing especially when he says 55grn is as heavy as he can use to be effective or accurate.

  7. #7
    Join Date
    Aug 2012
    Posts
    2,062
    Feedback Score
    9 (100%)
    Quote Originally Posted by Nowski87 View Post
    There is a youtube channel that I subscribe to, the guy is former LEO and worked in the industry blah blah. But he swears by the 7.5 for vehicle stuff due to the over all size, but I really can't behind the whole thing especially when he says 55grn is as heavy as he can use to be effective or accurate.
    And?? Who is it?
    AQ planned for years and sent their A team to carry out the attacks, and on Flight 93 they were thwarted by a pick-up team made up of United Frequent Fliers. Many people look at 9/11 and wonder how we can stop an enemy like that. I look at FL93 and wonder, "How can we lose?". -- FromMyColdDeadHand

  8. #8
    Join Date
    Nov 2013
    Posts
    462
    Feedback Score
    8 (100%)
    The cahnnel is under Abner Miranda. I hope I spelled that right, I like his info as another perspective.

  9. #9
    Join Date
    Jun 2006
    Posts
    13,156
    Feedback Score
    2 (100%)
    Quote Originally Posted by Nowski87 View Post
    There is a youtube channel that I subscribe to, the guy is former LEO and worked in the industry blah blah. But he swears by the 7.5 for vehicle stuff due to the over all size
    No. Just no.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


    Flickr Tumblr Facebook Instagram RECOILMAGAZINE OFF GRID RECOIL WEB

  10. #10
    Join Date
    Nov 2013
    Posts
    462
    Feedback Score
    8 (100%)
    Quote Originally Posted by Stickman View Post
    No. Just no.
    Oh I know if it isn’t 300 bulk I’m going 11.5 like I did with my current house gun. But the new BRN 180s uppers in 300 blk is calling me.


    Sent from my iPhone using Tapatalk

Page 1 of 4 123 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •