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 ...
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"
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?
Most don’t use the 168’s, but yes they fall off fast past 500.
Originally Posted by platella
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.
Desert Tech SRS A1 with TS Customs 308 win, 22 CM, and 7 LRM barrels
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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.
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.
Here you go: 140vld at the environmentals you specified.
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.
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.
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.
Originally Posted by Gunguy308
Rifle is a Rem 700p with a 26" barrel and had some action work done.
Originally Posted by tna9001
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Last edited by Gunguy308; 03-17-2018 at 09:37 PM.
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