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Old 08-04-2018, 06:20 PM   #1
TxAg
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Default 20" barrel in 308, 7-08, 6.5cm

If you were shooting a 20" barrel, which caliber would you prefer? Hornady's eld-x looks good in all three but shows data for 24" barrels.
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Old 08-04-2018, 06:40 PM   #2
softpoint
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.308
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Old 08-04-2018, 06:49 PM   #3
Stick1
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The .308 will be the most efficient.
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Old 08-04-2018, 06:58 PM   #4
skeeter
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308, Hornady match 168 grain, bthp,
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Old 08-04-2018, 07:00 PM   #5
smithb164
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308
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Old 08-04-2018, 07:34 PM   #6
Louis
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308, shoot the hornady American whitetail 150 gr interlocks in mine and dropped everything I've shot graveyard dead
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Old 08-04-2018, 08:54 PM   #7
Sandstone
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308
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Old 08-04-2018, 09:17 PM   #8
xman59
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most manufacturers use longer barrels so they can get higher velocity to advertise.... all three should do well in a 20" barrel
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Old 08-04-2018, 09:29 PM   #9
Johnny Dangerr
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I thought the 6.5 would win....

Not................

308................
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Old 08-04-2018, 11:00 PM   #10
texag93
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All have similar case capacities. All will perform equally well. I have a 20” 308, 22” 7-08 amd a 22” 6.5CM. Reloading for all of them, I can use faster burning powders to keep velocities up and velocity loss is minimal.
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Old 08-04-2018, 11:39 PM   #11
MarkV
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I had a 20" .308 sold it and had a 20" 7-08 built. And shooting game kings out of both.
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Old 08-05-2018, 12:16 AM   #12
bboswell
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Have hunted with 2 of the 3 and shot all. I would go 7-08 and choose Accubond or something other than ELD-X.

Long range bullets excel at just that, long range. Given the 20 barrel Im guessing you are looking for a hunting bullet for 350ish and in and a good bonded hunting bullet will provide more reliable results in that area
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Old 08-05-2018, 01:00 AM   #13
Brute Killer
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Quote:
Originally Posted by Stick1 View Post
The .308 will be the most efficient.
Would you cite some data, please?
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Old 08-05-2018, 08:24 AM   #14
TxAg
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Quote:
Originally Posted by Brute Killer View Post
Would you cite some data, please?
Probably something to do with the ratio of bore diameter to case capacity
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Old 08-05-2018, 09:44 PM   #15
TxAg
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Bump
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Old 08-05-2018, 09:53 PM   #16
bboswell
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Quote:
Originally Posted by TxAg View Post
Probably something to do with the ratio of bore diameter to case capacity


Thats my thought.

But Im a 7mm junkie so I choose to disagree
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Old 08-06-2018, 05:01 PM   #17
LWD
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Quote:
Originally Posted by TxAg View Post
Probably something to do with the ratio of bore diameter to case capacity
This. The .308 is relatively underbore compared to the other two choices. It will lose less fps for loss of barrel length. But it's really academic. Neither the 7mm-08 or 6.5 Creedmoor is really overbore and will do fine with a 20" barrel.

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Old 08-08-2018, 01:34 AM   #18
Balcones_Walker
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It’s for all intents and purposes a myth. A year later and my 16” creedmoor with a can is still my favorite gun.
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Old 08-08-2018, 04:09 AM   #19
joel45acp
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A 308 with 200+ grain cast lead boolits powered by some Trailboss with a can make for some fun night shoot'n. Just sayin'
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Old 08-09-2018, 06:43 PM   #20
Johnny44
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308 and I shoot 20”

There is NO reason to even screw with the other two.

I always choose a “better class of losers”
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