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Joined: Jan 2008
Posts: 3,628 Likes: 2
10 point
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10 point
Joined: Jan 2008
Posts: 3,628 Likes: 2 |
I'm getting 2900 out of my AR10 16" 308 with a 130 TTSX and been to 1000 with it no need for anything else really...
Last edited by 1bamashooter; 12/31/25 07:35 PM.
Keep your booger hooker off the bang switch.
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Joined: Jul 2012
Posts: 3,282 Likes: 15
10 point
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10 point
Joined: Jul 2012
Posts: 3,282 Likes: 15 |
Not enough gain vs 308 to make 338 worth the hassle to me. 358 is another story. Then again, I’d love to see a ‘408’ go commercial. 
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Joined: Oct 2017
Posts: 2,840 Likes: 45
10 point
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10 point
Joined: Oct 2017
Posts: 2,840 Likes: 45 |
I think if I had to do a medium range short barreled rifle, I’d like to have the .338 Federal running the 180gr Accubonds at around 2600-2700fps our of a 20”barrel. I think that would be a thumper. However no one offers rifles made for this cartridge anymore. I am thinking of a barrel swap in my old Savage 308. 35caliber.com, buy .243 and have it rebored to .338.
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Joined: Dec 2009
Posts: 11,239 Likes: 150
Booner
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Booner
Joined: Dec 2009
Posts: 11,239 Likes: 150 |
I think if I had to do a medium range short barreled rifle, I’d like to have the .338 Federal running the 180gr Accubonds at around 2600-2700fps our of a 20”barrel. I think that would be a thumper. However no one offers rifles made for this cartridge anymore. I am thinking of a barrel swap in my old Savage 308. 35caliber.com, buy .243 and have it rebored to .338. Couldn’t I just have the 308 barrel rebored?
It's hard to kiss the lips at night that chews your a$$ all day long.
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Joined: Sep 2012
Posts: 24,150 Likes: 305
Freak of Nature
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Freak of Nature
Joined: Sep 2012
Posts: 24,150 Likes: 305 |
I think if I had to do a medium range short barreled rifle, I’d like to have the .338 Federal running the 180gr Accubonds at around 2600-2700fps our of a 20”barrel. I think that would be a thumper. However no one offers rifles made for this cartridge anymore. I am thinking of a barrel swap in my old Savage 308. 35caliber.com, buy .243 and have it rebored to .338. Couldn’t I just have the 308 barrel rebored? Yes. Big Bore sent his to JES Reboring IIRC.
Dying ain't much of a living boy...Josey Wales
Molon Labe
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Joined: Oct 2017
Posts: 2,840 Likes: 45
10 point
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10 point
Joined: Oct 2017
Posts: 2,840 Likes: 45 |
I think if I had to do a medium range short barreled rifle, I’d like to have the .338 Federal running the 180gr Accubonds at around 2600-2700fps our of a 20”barrel. I think that would be a thumper. However no one offers rifles made for this cartridge anymore. I am thinking of a barrel swap in my old Savage 308. 35caliber.com, buy .243 and have it rebored to .338. Couldn’t I just have the 308 barrel rebored? Yeah, but then you'd still have a Savage.
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Joined: Jul 2020
Posts: 10,391 Likes: 73
Booner
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Booner
Joined: Jul 2020
Posts: 10,391 Likes: 73 |
Shorter bbls in 308 or whatever... Will need to pay attention to down range velocity and the bullet construction. If you get down to 16 or 18" bbl, MV is going to suffer a decent amount. Reduced MV means reduced velocity down range. A stout bullet like just about anything bonded, or even a 165 gameking (in 308) may not have the velocity and energy to expand well at the longer distances you mentioned. Just be mindful of that. You may want to play with the expected velocity numbers and choice bullet parameters in a ballistics program to get 300+ yard velocity estimates and cross reference them to minimum velocities needed for adequate expansion It’s been a while since I tested velocities in my 16” AR10 308. If I remember correctly the 165gr fusions were leaving the muzzle at just under 2600fps. The 130gr TTSXs were upper 2800s. I’d have to look back at my note. I went with the 165gr fusions because I may have a lifetime supply and no issues with performance on deer. And the shoot great in that platform. 165 grain Fusions out of mine with a 16 in faxon match barrel were 2510fps according to the gunsmith at Marks. Just an FYI. I have a 20 inch Ruger AG2 in 30-06, and would not want a suppressor on it if shooting out of a shooting house. It has a 19 or 20 in barrel.
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