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.308 winchester vs other "fast" .30's

Discussion in 'Rifle Country' started by BornAgainBullseye, Nov 21, 2008.

  1. BornAgainBullseye

    BornAgainBullseye Well-Known Member

    I am currently working up some loads for my cuz. He shoots a Winchester short action 300 mag. I was using some 165gr Nosler Ballistic tips that I use in my .308. According to the Nosler data book The 300 WSM knocks on the door of 3100 fps with a tad over 61 grains of RL-15!!!! Do you guys think that is wasteful or what. I mean my .308 does 2830's with 46 grains of Varget. This seems to be powder hog! I am thinking I need to get him some reduced charge loads that match 30-06 like performance. 2900fps or so. This .300WSM is a pig. The more I look at the .300 mag in various flavors makes me love my .308 even more. I can do almost the same thing with way less powder
  2. USSR

    USSR Well-Known Member

    Wasteful? Not if you want or need that kind of performance. That's the beauty of reloading, you can vary the performance by varying the charge weight and bullet selection. As an aside, he can duplicate your .308's performance, but you can't duplicate his .300WSM's performance.

  3. Shawnee

    Shawnee member

    Figure out what the 168-grainer at 3100 can do at 3100fps that it can't do at 2830fps. - then ask yourself if the difference serves any necessary or even significant purpose in the field. If it does - shovel that powder. If it doesn't - save the powder. I'm betting you'll be saving. :cool:

  4. db_tanker

    db_tanker Well-Known Member

    I thought that everyone knew that a white-tail deer will shed off any bullet that is going less than 3000 fps?

  5. BornAgainBullseye

    BornAgainBullseye Well-Known Member

    The point of this post was not making a .308 match a .300 WSM, but praising the .308win for doing over 90% of what the WSM can do with 75% of a WSM powder charge.
  6. benEzra

    benEzra Moderator Emeritus

    By these numbers, the .308 gives 83% of the kinetic energy with 75% of the powder charge, using identical 165-grain bullets. There is some loss in efficiency with the higher velocity cartridge, but not as much as you might think just by looking at the velocity numbers.
  7. BornAgainBullseye

    BornAgainBullseye Well-Known Member

    define "may think" The numbers are layed out. 270fps slower and 25% less powder. That is an extra .308winchester charge for every 4 WSMs that are loaded. I am not saying it is a bad choice, just not the most efficient.
  8. Shawnee

    Shawnee member

    Hi "Bornagain..."...

    The point you're making is 110% valid.

  9. skinewmexico

    skinewmexico Well-Known Member

    I'm with Shawnee. I haven't had my 300 Winmag out of the safe in almost 2 years. Hope it's still in there some where. Deer are just as dead.
  10. benEzra

    benEzra Moderator Emeritus

    I agree. I was just pointing out that energy and performance at range both relate to the square of the velocity, so the .308 is really not 90+% of a .300 WSM, more like 83%. It is still more efficient than .300 WSSM, just not by as wide a margin as the velocity numbers alone might suggest.
  11. BornAgainBullseye

    BornAgainBullseye Well-Known Member

    I was talking velocity, And yes actually it is 91.2% of the velocity of the WSM and uses 75.4% of the powder of the load I am referring to. Energy is a different story and at range the b.c. of the bullet will have a sloping effect. I know it may shine in the 200grain selection as it can lob a 220 grain monolithic round nose at the speed of my 165 boat tail, but Im not hunting rino either.
  12. 30mag

    30mag Well-Known Member

    You have a valid point.

    However, I have a friend who killed two hogs with one shot from his .338 Win Mag.
    My point is that you don't usually buy a magnum round to load it light.

    I'm with you though. A hog is just as dead with a .30-06, and it's cheaper.
  13. M'bogo

    M'bogo Well-Known Member

    Well being that the old .300 Savage can launch a 165gr bullet at 2,670 fps why not just sell the big guns and shoot the smaller more efficient .300 Savage?

  14. taprackbang

    taprackbang member

    Hogdon's website says that you can use 8.0 grains (!!) of Titegroup sending out a 168 grain Sierra HPBT.
    I verified this to be true and a reputable reloading manual confirms this. This means one pound of Varget will load 175 rounds, and one pound of Titegroup will load you 800 rounds!!

    Just DON"T double charge!!

    I remember Waco daily
  15. USSR

    USSR Well-Known Member

    Exactly. You can play this efficiency game both with going to another cartridge (as above), or also by going to a slightly faster burn rate powder in which you will use less powder to reach a particular velocity.

  16. BornAgainBullseye

    BornAgainBullseye Well-Known Member

    Im going to spill it and tell everybody that Im afraid of Titegroup. I wonder what kind of performance you would get if that powder charge was at the front of the case, like you raised the barrel up from the ground and fired. Verses up in the air and down to your target????? 8 grains?? what is it made of?? Does this stuff go Nuclear when you drop a bottle of it.
  17. longdayjake

    longdayjake Well-Known Member

    I just went to the website and I am sorry to say I could not find this anywhere. Where exactly did you find this?

    Found it!

    Looks like it is a weak load. I wonder if you added a couple of grains what would happen. hmmm...
  18. Envisaged

    Envisaged Well-Known Member

    Born Again:

    I will not use titegroup in rifle rounds - but is really efficient in handgun rounds. I have no idea what it is made of - but it really works.:)
  19. USSR

    USSR Well-Known Member

    Using a small amount of pistol powder in a large cased rifle cartridge creates what was called a Gallery load years ago. They are short range loads at best.

  20. LeonCarr

    LeonCarr Well-Known Member

    The .300 WSM is probably the most efficient of the .30 caliber magnums. Compare the performance of the .300 WSM with the .300 WM. Per the Hodgdon web page, using IMR 4350 the .300 WSM with a 180 bullet gets 2991 fps with 65 grains, and the .300 WM gets 2974 fps with 71 grains.

    I love the .308, and 99.5% of the deer and hogs (and 100% of the wild turkeys :)) I have shot have been shot with the .308. If you decide to kick it up a notch, the .30 caliber magnums would be a definite step up, even if less efficient than the .308.

    Just my .02,

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