7RM or 308

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by cva54, Jul 3, 2010.

  1. cva54

    cva54 Well-Known Member

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    What you all think? Here what I have learned after I started reloading 7mm powder hog, primers, & I dont care for belted mag. I got a .06 to. Didnt try to do this but after I got all the work done on the rifle. Its now a tack driver the .06 that is. Any way want to stay with 7.62
     
  2. kiwi3006

    kiwi3006 Well-Known Member

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    I did the reverse of you. Started with a 30/06, but it shot 165gr best at 2700 fps. Which I felt was too slow. I rebarreledto 7mm rem mag and love it. I haven't had any problem with the belt. It shoots a 168 berger at 3115 from a 26" barrel. Ballistically it is way better than the 30/06.
    If you want the ballistic advantage of the high BC .284 bullets but don't like the belt look at the 280AI, it will get pretty close to the 7mm mag velocity.

    Stu
     
  3. Oliveralan

    Oliveralan Well-Known Member

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    For beltless 7 mag performance, the .284win would also be a good option. 180 Berger at 2800 with conventional powders, 2900+ with RL17. You can also use excellent 6.5-284 brass
     
  4. fmajor

    fmajor Well-Known Member

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    This is a subject built for discussion!!!

    I read an article by the Chief Ballistician for Berger Bullets (can't remember his name off the cuff) about why the 7mm caliber was superior to .308 for long-range hunting.

    Since I'm writing this from my ever-diminishing memory, i'm probably making inaccurate references and drawing erroneous conclusions from that article. However, as i recall my opinion and experience-formed intuition about the 7mm caliber vs the .308 was affirmed by his empirically-derived, scientific hypothesis.

    In brief, that to achieve equal BC parity with the 7mm cartridges, .308 caliber cartridges had to go with a much heavier bullet, commensurate increase in powder charge with resultant increase in recoil - just to acheive parity. However, iirc, the 7mm still maintained a better trajectory and higher retained energy at "equal weight-for-caliber projectiles" requiring lower, more efficient powder charges.
     
  5. cva54

    cva54 Well-Known Member

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    just to clear it up I got a .06 and a 7mm rem mag. Thinking about getting rid of the 7mm & go to 308. So the bullets primer are the same. Just think it would make it easyer on my self 270 win looks good to
     
  6. Dr. Vette

    Dr. Vette Well-Known Member

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    The "problem" with the 270 is that there are less bullets available than there are for a 7mm or a .30 caliber rifle. Much of the "good stuff" for long range is not available or if so in a limited selection. That's a part of the reason I sold my 270WSM and went with a couple of other rifles - including a few 7mm's (7mm-08, 7mm Rem Mg, 7mm Wby Mg) and my new (to me) 340 Wby.
     
  7. AZShooter

    AZShooter Well-Known Member

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    You said you wanted to simplify with only one caliber. Sell the 30-06. Keep the 7 rem mag and make one of the short action 7mms: 7 SAUM, 7-08, 284 win or 7 wsm.

    FYI I have a 284 win in a sporter rifle and a 14 lb long range 7 rem mag.

    Good article:

    7mm Cartridge Guide
     
  8. specweldtom

    specweldtom Well-Known Member

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    CVA 54, what I've learned in the last 40 yrs of shooting both.

    .308 Win is an accurate round with limited ballistics for long range.

    A 7mm Rem Mag with 168gr Smkhp's is twice as flat as a .308 with 168gr Smkhp's between 600 and 1000 yds, and is the equal or better for intrinsic accuracy. However, it doesn't kill deer in their tracks any better than a .308.

    Overall, I would give the edge to the 7 Rem.

    I now prefer hunting with a big .30 or .338 for anything except turkeys. A clean chest shot with a .30 x .378 or .340 drops them within 10 feet of where they were when hit, and they bleed out nicely, unlike a neck or head shot.

    Oh yeah, I hate tracking in the dark.

    Not much for 40 yrs or so, but just about sums it up.

    Good hunting, Tom
     
  9. Chas1

    Chas1 Well-Known Member

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    cva54, just curious. Since your 06 is now a tack driver...what would be the benefit to going with a 308?
     
  10. cva54

    cva54 Well-Known Member

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    To have a 2nt rifle witch I already got but dont care the cal. 7RM is just little big for MN. And after starting reloading I know more now.