300wm: 165G or 180G bullet

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by mrbofus, Dec 16, 2012.

  1. mrbofus

    mrbofus Well-Known Member

    Messages:
    206
    Joined:
    May 8, 2012
    Topic open for discussion,

    reading reloading ballistic charts and reloading manuals, if I am not mistaken, looks like the 165g bullet is faster, flatter, and carries more energy than the 180g bullet,

    Why use the heavier bullets?
    Please help me understand.
    MB

    I apoligize if this is a dead horse subject, just point me in the right direction for further readings.
     
  2. brentc

    brentc Well-Known Member

    Messages:
    1,610
    Joined:
    Apr 3, 2009
    It really depends on what you are trying to do. If you are consistently shooting 400-600 yards the 165 is a great bullet because you can drive it faster with less recoil. There isn't enough difference in BC between the two to give any extra advantage by stepping up to the 180. Between the two, I'd go with the 165 especially if you use a maximum point blank range setup.

    However, when you step up to 200, in let's say an Accubond using advertised BC, You will see decreased muzzle velocity, but the .588 BC allows the bullet to carry a higher amount of energy and retain more velocity than both the 165 and the 180 past the 600 yard mark.

    This is why more long range guys shoot the heavier bullets, because in many cases, heavier bullet = higher BC. Higher BC = greater retrained energy and veloctiy at long range. I shoot the 210, 215, and 230 Bergers in my 300s for this very reason.
     

  3. jsthntn247

    jsthntn247 Well-Known Member

    Messages:
    661
    Joined:
    Jan 14, 2009
    Shoot a deer with a 165 balistic tip at less than 100 yards at max velocity and report back how you feel about them. Hopefully this will be in heavy cover and you can tell us about your blood trail.
     
  4. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,280
    Joined:
    May 13, 2012
    I've been killing deer with my 300 win with 165 hornady for years and they are simply deadly. You will have a lower time of flight mid-range, and that is really important on killing running game. I don't want to wish/hope/pray that the thing doesn't turn or slow between the trigger pull and the pill landing on fur. Any shaving of the time of flight helps. 3300 fps is attainable with a 300 win with a 165; about 3100 with a 180. That's about a 5% shave off of your time of flite. You will also have a slightly longer max pbr with the 165.
     
  5. mrbofus

    mrbofus Well-Known Member

    Messages:
    206
    Joined:
    May 8, 2012
    Well stated, that makes sense to me when explained as you did,
    thank you



    Please explain?


    thank you,
     
  6. D.ID

    D.ID Well-Known Member

    Messages:
    838
    Joined:
    Dec 24, 2008
    165 is a great choice for mpbr...................................thinking......................mpbrhunting.com? Heavier is better at long range, flatter and faster only gives advantages at close range were you don't need them with a 300 win mag. The time of flight advantage at close range is the one distance it matters the least. At pbr time of flight is irrelevant. If your running a heavy mag you might as well run heavy pills. My opinion.