How Barrel Length Affects Velocity: 223/5.56, 308, & 9.3x62 Velocity Test

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How Barrel Length Affects Velocity: 223/5.56, 308, & 9.3x62 Velocity Test

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Big Game Hunting Blog

Күн бұрын

Пікірлер: 49

@Thebiggamehuntingblog Ай бұрын

Get my Free E-Book on the best hunting calibers here: thebiggamehuntingblog.com/ebook

@beastkiler2 Ай бұрын

Some surprising results! Great video! I think you should make a video series and test all the common chamberings. I would like to see the 7mm-08 from 18" to 24". 6.8 Western would be interesting too

@scottythebody0811 Ай бұрын

Great review. It very well demonstrates how efficient the 308 is. Thanks for posting.

@Thebiggamehuntingblog Ай бұрын

Glad you enjoyed it!

@robertkeller9828 Ай бұрын

308/30 cal in general still rules. !

@edwardhoward4708 Ай бұрын

For reference, I took a lot of data on barrel length and muzzle velocity from “ballistics by the inch” and “rifle shooter”, did some averaging, and figured out this; 1. A 5.56 or .223 (assorted loads all averaged) gains about 30 fps for the first inch past 16”, 29 fps for the next inch, 28 fps for the next inch and so on. 2. For .308 with 150 grain bullet it gains about 25 fps for each inch past 16”, 24 fps for the next inch, and so on… Note I said “about”.

@KG-wn7fm Ай бұрын

Great review. I don't think I have seen a fps comparison on barrel length before. Thanks for using common cartridges 556 and 308.

@Thebiggamehuntingblog Ай бұрын

Glad you enjoyed it!

@bekkerbosbeer3453 Ай бұрын

Thanks , great comparison video ,much appreciated 👍🏻

@Thebiggamehuntingblog Ай бұрын

Glad it was helpful!

@jameswilson5562 Ай бұрын

It makes a difference but not much with cartridge that doesn't hold alot of powder when u get into cartridge that holds 80 plus grain of powder there is a big difference

@Thebiggamehuntingblog Ай бұрын

I agree. That's probably why there are fewer barrel length options for the bigger magnums: you can get a 26" barrel or maybe a 24" barrel too, but that's it. Putting an 18" barrel on a 28 Nosler (or similar) would probably be a big waste of time.

@Theloss52 Ай бұрын

I see pressure waves in a barrel, sorta like variable intake runners or velocity stacks in an internal combustion engine. So going 1-2" longer from one point may not give you as much increased velocity as the next 1-2" would. I can only think it's because there are waves of energy bouncing up and down the barrel as the bullet is pushed out

@chipsterb4946 Ай бұрын

The video is great! Really solid, useful data. One takeaway for me is that while 16” is a good minimum barrel length for 5.56, 18”+ is what you need for .308. Just in general - lots of exceptions. The archived BallisticsByTheInch web page show good data for pistol cartridges plus .223 Remington. There you see the loss for every inch of barrel increase significantly when you go from 16” to 14” with a 150 grain bullet. Most of the pistol cartridges start showing a decrease in muzzle velocity once you hit a certain barrel length. .44 Magnum and .45 ACP both do best with a roughly 16” barrel. 9mm Luger looks like 12-14” produces maximum velocity. I recently tested .45 ACP in 4.45” HK, a 5” 1911, a 6” barrel revolver (equivalent to 8” case head to muzzle), and a 16” PCC. One surprise was the revolver produced the same velocity as the 4.45” semiauto. I knew the revolver had oversized chambers but wow! The other surprise was the 16” barrel only yielding about 10 fps per inch vs. the 1911. It’s possible the PCC’s blowback action wasted some energy the 1911 retained because of its different lockup mechanism. (This was with 2 different types of 230 grain loads.)

@jordanr8312 Ай бұрын

Great content John and makes me miss living in ETX.

@Thebiggamehuntingblog Ай бұрын

Thanks, glad you enjoyed it!

@AlienMetals Ай бұрын

That Bergara barrel seems fast. I'd be curious to see what a different 18" barrel would do.

@liverpool6380 Ай бұрын

So happy you did this!🥃🇺🇸

@corybrown8422 Ай бұрын

Nice test

@Thebiggamehuntingblog Ай бұрын

Thanks!

@AlienMetals Ай бұрын

Haven't watched the vid yet but typically the 308 looses appx 25fps per inch.

@a15thcenturysuitofgothicarmor Ай бұрын

The 308 info seems really weird. A 125gr goung slower and 150gr or a 165gr. What?

@Thebiggamehuntingblog Ай бұрын

You make a good point. That 125gr load is from Hornady's "Custom Lite" line that's a lighter bullet going slower than normal to provide a low recoiling option for hunters. I was curious to see if a "low powered" load like that would be less sensitive to barrel lengths than more typical loads.

@a15thcenturysuitofgothicarmor Ай бұрын

@@Thebiggamehuntingblog ohhh I see, I had thought maybe that was a custom load to basically have an exaggerate example of what the velocities would look like. My bad

@Thebiggamehuntingblog Ай бұрын

No worries. That was a good question because it is indeed an unusual load.

@MUI_Shaggy01 23 күн бұрын

Any barrel shorter than 24 inches is too short, my Savage 110 in 223 has a 26 inch barrel, and I typically get 3,400 ft/s with just 55gr fmj ammo.

@Slothlikelou Ай бұрын

Could you do a comparison between rounds being in direct sunlight at the same temp from being covered or stored? Direct heat could create a higher temp. Just curios.

@WesternReloader Ай бұрын

Ironic when a dude gets a magnum-ish cartridge, but then puts it in a 20” barrel, reducing the velocity to that of a non magnum. Weird flex

@Thebiggamehuntingblog Ай бұрын

100%! Great way to turn a 6.5 PRC into a 6.5 Creedmoor!

@MilwaukeeDillPickles Ай бұрын

Sometimes the priority is the short barrel. And if it is, you’ll have to start with a hotter load to retain performance

@cjberan Ай бұрын

Putting on a suppressor is a big reason. It’s no fun walking through the woods with a 24inch plus barreled gun

@edwardhoward4708 Ай бұрын

@@cjberanit is for this reason I am looking for a rifle with falling block action. A 26” barrel leads to a gun that is as long as a bolt action with 20” barrel.

@chipsterb4946 Ай бұрын

@@edwardhoward4708I just got a Ruger No. 1-B in .270 Winchester with a 26” barrel. It doesn’t feel any longer than my 22” Sako A III carbine. I’ve only taken it to the range to sight in the scope, but I think it will turn out to be a sweet rifle.

@whillhern Ай бұрын

I love your videos sir. I really love the ones with Kevin Robertson. I have a Ruger M77 270 with a barrel that is onnits way out. Who did the 9.3s for you guys? I have always wanted one on either a win mod 70 or Ruger m77.

@Thebiggamehuntingblog Ай бұрын

Thanks! Unfortunately, the gunsmith who did that work for us has retired and closed up shop. That's a shame because he did really good work!

@antonioperezchica6902 Ай бұрын

I Had a LH M77 Converted from 30-06 to 9.3x62 a few years ago. Benchmark Barrle in WA, made the barrel and install it. I then Had BRUBAKER ARMS do the internal adjustments to get it feeding and extracting Perfectly. It Shoots wonderful and i have Taken Deer, Bear and Elk with it over the past 4 years. If i where to have another 9.3x62 made BRUBAKER ARMS would be the first person i would talk to. Good Luck with your Project!