308 vs 6.5 vs ??? - Page 8

308 vs 6.5 vs ???

This is a discussion on 308 vs 6.5 vs ??? within the Cartridges & Calibers forums, part of the Sniping Related category; Welcome back Orkan, I missed your knowledge and delivery of it. As a self confessed long range and reloading newbee I found your articles a ...

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Thread: 308 vs 6.5 vs ???

  1. #71
    Member damo-eire33's Avatar
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    Welcome back Orkan, I missed your knowledge and delivery of it.

    As a self confessed long range and reloading newbee I found your articles a huge help. I only wish I was your side of the pond to attend a class.

    Good to see you fully "recharged"

  2. #72
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    Quote Originally Posted by Orkan

    308win w/175SMK @ 2700fps = 600yds = 1730fps, 1163 ft/lbs energy
    6.5CM w/140berger @ 2750fps = 600yds = 1969fps, 1206 ft/lbs energy


    Hornady Ballistics chart:

    308win w/168gr ELD Match @ 2840fps = 500yds - 2029fps, 1535 ft/lbs energy
    6.5 Creedmoor w/147 gr ELD Match @ 2695fps = 500yds - 2092fps, 1428 ft/lbs energy

    This is from Hornady's Ballistic chart. They only take it to 500 yards.

    I'm guessing that must be the distance where the 6.5 CM starts to excel and 308 diminishes?

  3. #73
    Senior Member ddd oo7's Avatar
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    Quote Originally Posted by platella View Post
    Hornady Ballistics chart:

    308win w/168gr ELD Match @ 2840fps = 500yds - 2029fps, 1535 ft/lbs energy
    6.5 Creedmoor w/147 gr ELD Match @ 2695fps = 500yds - 2092fps, 1428 ft/lbs energy

    This is from Hornady's Ballistic chart. They only take it to 500 yards.

    I'm guessing that must be the distance where the 6.5 CM starts to excel and 308 diminishes?
    Most don’t use the 168’s, but yes they fall off fast past 500.

    178’s are more standard for long range 308 with Hornady bullets. They are almost equal at 400 yards and the 6.5 surpasses them in energy by 500 yards (1337 vs 1428). At 600+ the 6.5 will have more energy than almost any 308 win bullet. Seeing as we are discussing long range precision and hunting and not short range ballistics, the above argument stands.
    NorCalFocus likes this.
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  5. #74
    Sponsors Orkan's Avatar
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    Hornady's numbers are tainted with marketing. 2840fps with a 168!?!? No wonder why I see customers/students with pressure problems when using hornady ammo.

    We can play numbers all we want. I can give you numbers for a 30" 308 pushing 155's at 3000fps. Impressive. Yet that is not the discussion. All things being equal, the 6.5 creedmoor is better than 308 at basically everything.

  6. #75
    Super Moderator NorCalFocus's Avatar
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    My personal load with the 178 Amax only puts down 1380 pounds of energy at 500 yards.

    This is real world data right here. If someone has 6.5 info they’d like to post I’d love to see the real world comparison. That’s 1200 feet of elevation, 75*, 28 station pressure, 35% humidity. I gain a bit more as I go higher in elevation.

    -I redefined trust between my wife and I. I bought her a gun, taught her to shoot, and made her the beneficiary on my life insurance.

  7. #76
    Sponsors Orkan's Avatar
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    Here you go: 140vld at the environmentals you specified.


  8. #77
    Senior Member donnie's Avatar
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    Here is a pic from last week of my 308 against a 6.5cm. This is my highly modified stinky savage model 12 with 26" benchmark barrel, and a Tikka tac A1 6.5cm 24" barrel with a Schmidt and Bender PMII 5-25. I still love my vx2 6-18 AO target, even though I have a Tangent Theta and have used buddy's S&B. We are both 16 clicks elevation @300yds. Next week we will move out from 300 to 500, unless I bring my 300wsm.
    IMG_7764.JPG
    The ground was covered in ice for the longest time and I learned quite a bit about shooting fundamentals from having to shoot in what mother nature gave me. There is a huge difference in recoil when shooting on ice from the 308 to the 6.5cm. Even though I don't have a muzzle break, my rifle is usually very tolerable to shoot due to the weight. With the ice we had, when shooting, it felt like a 200 lb man was booting me in the shoulder. When I was shooting buddies 6.5, I could keep the rifle on target and I wasn't the slightest concerned about the recoil. The 6.5 recoiled like a popcorn fart on the shoulder lol. Buddy will probably upgrade to a bull barrel because he only gets 3-5 shots in before his barrel heats up. I can easily do 10-15 in 5 round strings before I'm the slightest concerned with heat.
    I will say, 6.5cm quality ammo is still somewhat hard to find on shelf but this could be due to its popularity. Or you stingy Americans hogging all the ammo! Either way I was almost about to acquire a 6.5cm of my own, but I am enjoying becoming proficient with the 2 rifles I currently shoot.
    We suspect buddy's 6.5 is about to start pulling away from the 308 any distance now, but without cronographing either rifle, we are just guessing. All things being equal, there is no argument, the 6.5 will outshine the 308.

  9. #78
    Senior Member Gunguy308's Avatar
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    This is my .308 data ammo is 175gr Federal GMM

    Sent from my VS995 using Tapatalk

  10. #79
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    Quote Originally Posted by Gunguy308 View Post
    This is my .308 data ammo is 175gr Federal GMM

    Sent from my VS995 using Tapatalk
    What are the environmental numbers for that data? Looks pretty impressive for a .308.

  11. #80
    Senior Member Gunguy308's Avatar
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    Quote Originally Posted by tna9001 View Post
    What are the environmental numbers for that data? Looks pretty impressive for a .308.
    Rifle is a Rem 700p with a 26" barrel and had some action work done.

    Sent from my VS995 using Tapatalk
    Last edited by Gunguy308; 03-17-2018 at 09:37 PM.

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