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Joined: Nov 2010
Posts: 64
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Nov 2010
Posts: 64 |
What kind of velocity can one expect in a 308 with a 16 1/2 inch or a 20 inch barrel using 130 grain bullets
Last edited by grayfox; 01/07/24. Reason: Miss spelled
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Joined: Jun 2004
Posts: 44,892 Likes: 12
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,892 Likes: 12 |
Hodgdon shows a bunch of loads at 2800 or so out of a 15" test barrel.
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Joined: Aug 2022
Posts: 2,035 Likes: 5
Campfire Regular
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Campfire Regular
Joined: Aug 2022
Posts: 2,035 Likes: 5 |
In my experience, it depends on the barrel.
"Full time night woman? I never could find no tracks on a woman's heart. I packed me a squaw for ten year, Pilgrim. Cheyenne, she were, and the meanest bitch that ever balled for beads."
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Joined: Nov 2013
Posts: 28,945 Likes: 23
Campfire Ranger
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Campfire Ranger
Joined: Nov 2013
Posts: 28,945 Likes: 23 |
Don’t know about the velocity, but I have a fair notion of the report, more than I want…
What fresh Hell is this?
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Joined: Jun 2001
Posts: 32,206 Likes: 5
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2001
Posts: 32,206 Likes: 5 |
Enuf to kill chit at most any reasonable range. The first thing I killed with a 17" '06 , and 180 gr factory load bullets, was a ram at 330 yards. The two important things beyond bullet construction is knowing the range and the load's trajectory. Velocity is over-rated.... JMO. Still to be considered sometimes.... Others have need for a crony- I've never owned one. I guess I don't know what I'm missing? I'm still happy.
Last edited by las; 01/07/24.
The only true cost of having a dog is its death.
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Joined: Oct 2013
Posts: 1,518
Campfire Regular
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Campfire Regular
Joined: Oct 2013
Posts: 1,518 |
"Russia sucks." ---- Me, US Army (retired) 12B & 51B
Russian Admiral said, after the Moskva sank, "we have the world's worst navy but we aren't as bad as our army".
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Joined: Jul 2001
Posts: 60,207 Likes: 26
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,207 Likes: 26 |
It depends on the individual barrel. Some barrels are slow, some are fast, and some are "half-fast."
It also depends on the powder, primer, etc.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Mar 2018
Posts: 1,023
Campfire Regular
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Campfire Regular
Joined: Mar 2018
Posts: 1,023 |
I would expect a 20" barrel to have 125fps additional velocity over a 16.5" barrel. tdoyka is probably the closest with right around 100 fps.
I usually experience a 200fps difference between a 16.25" and a 26" barrel 308 win. 21" would split the difference perfectly and so 20" would normally be a touch slower. Individual barrels will vary in actual performance.
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Joined: Nov 2018
Posts: 1,490
Campfire Regular
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Campfire Regular
Joined: Nov 2018
Posts: 1,490 |
I compared various .308 Winchester loads, including some with the 125 grain Nosler Ballistic Tip, from 16.25" and 24" barreled rifles. The short barreled 308 impressed me with both accuracy and velocity: I think 2905 fps is worthwhile. I've seen that little 125 grain Nosler Ballistic Tip in action on a fat whitetail buck, and it did real well at about 120 yards. The 130 gr Barnes TTSX would also be an interesting option... Regards, Guy
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Joined: Nov 2005
Posts: 23,142 Likes: 6
Campfire Ranger
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Campfire Ranger
Joined: Nov 2005
Posts: 23,142 Likes: 6 |
16.5" barrel? Begs the question - why?
"You can lead a man to logic, but you cannot make him think." Joe Harz "Always certain, often right." Keith McCafferty
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Joined: Jun 2004
Posts: 44,892 Likes: 12
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,892 Likes: 12 |
16.5" barrel? Begs the question - why? Maybe close to legal minimum to make room for the length of a can?
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Joined: Jun 2004
Posts: 44,892 Likes: 12
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,892 Likes: 12 |
I compared various .308 Winchester loads, including some with the 125 grain Nosler Ballistic Tip, from 16.25" and 24" barreled rifles. The short barreled 308 impressed me with both accuracy and velocity: I think 2905 fps is worthwhile. I've seen that little 125 grain Nosler Ballistic Tip in action on a fat whitetail buck, and it did real well at about 120 yards. The 130 gr Barnes TTSX would also be an interesting option... Regards, Guy If you average this all out it coms to 27.375 fps per inch. This fits what I've seen with various bullets and powders across my herd of 308 chambered rifles.
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Joined: Apr 2011
Posts: 152,183 Likes: 35
Campfire Savant
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Campfire Savant
Joined: Apr 2011
Posts: 152,183 Likes: 35 |
My Savage hog hunter has an 18”, kills hell out of pigs at 275 yards with a 150 grain GameKing.
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Joined: Dec 2004
Posts: 17,250 Likes: 1
Campfire Ranger
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Campfire Ranger
Joined: Dec 2004
Posts: 17,250 Likes: 1 |
Yeah, I’d expect around 25-30fps per inch.
I sent off a magnum-contour 22” .308 bolt gun not long ago for a chop/thread at 17”. Makes for a very pleasant shooter with a 7” suppressor.
Now with even more aplomb
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Joined: May 2004
Posts: 56,219 Likes: 25
Campfire Kahuna
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Campfire Kahuna
Joined: May 2004
Posts: 56,219 Likes: 25 |
One of my favorite barrels is 42” long.
I am..........disturbed.
Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain
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Joined: Jun 2004
Posts: 44,892 Likes: 12
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,892 Likes: 12 |
One of my favorite barrels is 42” long. Is it on a 308?
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Joined: Jul 2001
Posts: 60,207 Likes: 26
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,207 Likes: 26 |
One of the interesting things about this sort of conversation is that only rarely does anymore figure out how much velocity a typical 125-130 grain .30 caliber hunting bullet loses at 100 yards--or any other range.
Most hunters have been fixated on muzzle velocity ever since the appearance of smokeless powder, even thought it's made less and less difference as powders and bullets have improved....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Feb 2007
Posts: 7,954 Likes: 5
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2007
Posts: 7,954 Likes: 5 |
The only way to know is to shoot the loads from a 20" barrel, cut it to 16.5" and measure the speed at 16.5". I'd expect 50-100 fps less. BUT... you can see 100 fps difference between 2 different 20" barrels. Both of them will lose 50-100 fps when cut, but since one of them may start 100 fps faster than the other it is entirely possible to find an individual 16.5" barrel that is a bit faster than another 20" barrel. OR.... an individual 16.5" barrel may well be 200 fps slower than another individual 20" barrel.
Most people don't really want the truth.
They just want constant reassurance that what they believe is the truth.
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Joined: Mar 2013
Posts: 156
Campfire Member
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Campfire Member
Joined: Mar 2013
Posts: 156 |
Out of an 18” BAR MK3 I’m shooting the 150 gr Lapua Mega SP at 2730’s. This has been great whitetail medicine. Not what you asked, but some info that may help. Powder selection may make a difference by going to something on the faster side. Pretty sure that one was with CFE223 or PP2000.
Shoot straight, shoot often
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