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Thread: 16 inch .308

  1. #1

    16 inch .308

    I see that RPA rifles are offering a .308 with a 16" barrel.Does anybody have any expeirence with a rifle with such a short barrel.It ought to be a handy little rifle if you do not loose to much velocity.
    Thanks sean

  2. #2
    No, but I believe someone here has a rifle that short, maybe IanF? a 308 is probably the ideal candidate for a short barrel like this. Load 150gr bullets with a fast powder like Benchmark and it should be the mutz.

    I played with a friends 260rem recently, which had been chopped to 19 or 19.5". I liked it so much, my 260 is going to Steve Kershaw today to have a couple of inches off, with a rethread and recrown.
    Brian.

    Just because you are paranoid, doesn't mean they aren't out to get you......

  3. #3
    For woodland stalking what more would you need...? I use 20" barrels for my main stalking/foxing rifles, its perfect for medium ranges and tight areas.

  4. #4
    Quote Originally Posted by sean View Post
    It ought to be a handy little rifle if you do not loose to much velocity.
    Thanks sean
    You will. And energy. Approximately 65 feet per second per inch is the formula for 30-06. I imagine 308 would show a similar result. As compared to a standard 24" barrel, you'll lose 520 feet per second going to a 16" - so a 150 gns bullet at 2800 ft per second becomes 2280. Energy at 100 yds falls from 2141 to 1392 ft lbs.

    I hope my maths is correct.

    Why would anyone want a 16" barrel anyway? I thought handguns had been banned. As lurking Richard will testify, length matters.
    KevinF -

  5. #5
    Quote Originally Posted by KevinF View Post
    ....you'll lose 520 feet per second going to a 16" ....
    I seriously doubt that. I would be surprised if you lost more that 200FPS total over a standard barrel. This is all down to careful hand loaidng with a suitable powder.
    Brian.

    Just because you are paranoid, doesn't mean they aren't out to get you......

  6. #6
    I think RPA were quoting about 2600fps with a 150gr.I wonder what you could push 125 grainers at. Kevin size isn't everything it's what you do with it that matters

  7. #7
    Quote Originally Posted by Claret_Dabbler View Post
    I seriously doubt that. I would be surprised if you lost more that 200FPS total over a standard barrel. This is all down to careful hand loaidng with a suitable powder.
    Brian - The physics is inflexible, I'm afraid. Use the same load in a 24, then a 16 and, if my maths is correct, that's the result.

    Of course it's possible to use a hotter load to claw back some of the lost velocity, but that's not the point I was making.
    KevinF -

  8. #8
    Quote Originally Posted by sean View Post
    I think RPA were quoting about 2600fps with a 150gr.I wonder what you could push 125 grainers at. Kevin size isn't everything it's what you do with it that matters

    I know. I know. I started it. However, I think this thread is heading in a southerly direction. I'll get my coat.
    KevinF -

  9. #9
    Quote Originally Posted by sean View Post
    I think RPA were quoting about 2600fps with a 150gr.I wonder what you could push 125 grainers at. Kevin size isn't everything it's what you do with it that matters
    125g heads are not to good in a 30 cal, as far as im aware they are a varmint bullet to a degree as such they make a mess! They have very little in back end, thus they do explode with deadful effect.

  10. #10
    Quote Originally Posted by KevinF View Post
    Brian - The physics is inflexible, I'm afraid. Use the same load in a 24, then a 16 and, if my maths is correct, that's the result.

    Of course it's possible to use a hotter load to claw back some of the lost velocity, but that's not the point I was making.
    Kevin, I am in form for a lively discussion on this one. I am increasingly enamoured of short barrels these days. In these days of almost universal mod use, who would entertain a 24" 308? I would say 20" is the maximum barrel I would consider, not the minimum. Now, I will concede, as the calibre gets smaller, and the powder used gets slower, you do need a bit of extra barrel to get the most out of it.

    The physics are not that inflexible. A judicious choice of bullet and powder can maximise velocity from a short barrel. The loss of velocity is not linear for every inch of length lost. Certainly when you go below 19", the velocity might drop off a little faster, but not enough to really matter. I would guess that the vast majority of woodland deer in the UK are shot at under a 100m. Lets use the quoted velocity of 2600FPS with a 150gr bullet. Of the cuff, that is roughly the velocity a convential 308, wringing out every drop of velocity, would carry at 175 - 200m. Do you believe a 308 lacks the energy to kill a deer at 175m?

    I read a very favourable review of that RPA recently, but I cannot remember where. Now I would say that 16" is a bit short, but it is an interesting idea. As mentioned earlier, I used a custom 260rem a couple of weeks back. It had a Barnard action, a sodding big Swaro scope, 19.5" LW 1250 weight barrel and an ASE Utra hanging on the end. This little beauty handled like a wand, seriously, like a convential 24" rifle without a mod. I couldn't believe. My 260 is now away to have the appropriate modifications done.
    Brian.

    Just because you are paranoid, doesn't mean they aren't out to get you......

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