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.270W 150gr and 30-06 150gr.?

Late-Bloomer
On deer-sized game at 250yds.

Both animals will be dead with a well placed shot no doubt...

But what would be the external ballistics and pros/cons of each?

Say for a Win. Power-Point or Rem CL....

Just curious and would appreciate your thoughts...[;)]

Thanks folks!
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Comments

5 comments

Date Votes
  • tsr1965
    Hello Roland,

    Usually from a ballistics standpoint, because of the larger bore diameter(more square inches of surface area for force to be applied to), and close to equal pressures, the 30-06 will usually be started out faster. However, as the 270 has a longer bullet, which usually will have a higher BC, and at about 200 yards catches up and passes the 30-06. The data below was taken from Winchester's web site, and used their power points of 150 grains for each. The BC of the 30-06 was .270, and the BC of the 270 was .345.


    drop
    distance vel energy w/200 yd zero

    270
    Muzzle 2850 2705

    300 2100 1468 -8.6

    30-06

    Muzzle 2920 2839

    300 1972 1295 -9


    At the 300 yard mark they are close enough that no animal or human would be able to tell the difference.

    I would expect very similar data using Remington or Winchester components.

    Best
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  • nononsense
    Late-Bloomer,

    If you use the Remington data comparison found on their website this trend that 'tsr1965' shows, is reversed but for a good reason.

    Remington Core-Lokt has a pointed version in 150 grain .30 caliber and a non-pointed version in the 150 grain .27 caliber. The BC for the .270 bullet is lower than the BC of the .308 bullet so the performance is affected as the distance increases.

    Remington, Winchester and Federal all have a ballistics comparison area in the ammunition section of their websites. They are plug and play menu driven operations so it's easy to get comparisons quickly. These are a tremendous help when trying to decide between bullets and cartridges.

    Best.
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  • quickmajik
    Hmm..

    .270 150 grain projo
    MV/V@300y./(E. in f.lbs.@300y.)/B.D.
    2900/2470/1700/-7.5

    .30-06 150 grain projo
    MV/V@300y./(E. in f.lbs.@300y.)/B.D.
    2910/2340/1450/-7.2

    I believe the .270 Projo has better sectional density then the .30 cal projo of the same weight..


    Thats what i intended to do mobuck, but I didnt want to deviate topic question, the 130/140 grain projo in the 270 win loaded hot is where the round really shines in my opinion too.

    lighter recoil/better trajectory, very little energy loss when compared to 150 grain bullet inside 400 yards.
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  • Mobuck
    A slightly better comparison would be the .270 130 grain Rem corelokt and the 30/06 150 (same). These bullet weights are commonly accepted as "deer bullets" by oldtimers. The .270 150 is regularly compared to the .30/06 180 grain. Given equal construction, the lighter bullets at higher velocity will expand slightly quicker giving better performance on deer sized game.
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  • Late-Bloomer
    Thank you gentlemen I appreciate ALL your replies!!!...[:D]

    I learn alot when I come here!

    L-B
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