.308WIN Speed vs Weight?

If your barrel is longish, you can shoot lighter bullets at a relatively high velocity, but if your rifle has a barrel shorter than say 22" heavier bullets give up less velocity when fired through the shorter tube. The higher the muzzle velocity, the higher the impact velocity at any given range, and when the impact velocity exceeds 2500 fps or so, a bullet with stouter construction should be chosen to resist failures such as extruded cores and jacket separation. That said, 150 gr .30 caliber bullets loaded to 2700 fps have been killing game up to a ton in weight, in Africa, Asia, Australia, Europe, and here in North America for 100 years. The rifles that spit out that .30 bullet out might have been chambered for the .30/06, the .303 Brit, or the 7.62X54R early in the 20th Century, and for the .308 50 years later. These days, with the advent of modern bullet technology, bullet weight is less important than bullet construction. If you're deer hunting, a relatively fragile bullet like a Sierra Game King, or Remington, or Winchester bulk bullets, will perform superbly. But if you need a bullet for use on heavy or dangerous game, TSXs, Partitions, or A-Frames are better choices, as penetration rather than rapid expansion is the critical criteria. If you just want a single bullet to use across a wide spectrum of big game uses, a Nosler AB or a Swift Scirocco comes to mind, but years ago my go to bullet for the .30/06 was the modest Hornady 165 gr BTSP, and from the standpoint of accuracy, out to 500, and terminal performance, this one never let me down.
 
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Amax bullets aren't designed for hunting even though they may work. There are better slugs out there for the purpose. Amax are for punching paper. Light bullets driven fast are fine for all the animals in your category as long as the bullets are built tough. A good bonded bullet or a good TSX or Hornady expanding solid will do fine. When using conventional bullets, then a heavier weight gives more margin for error when shooting big critters.
 
One thought is that bullets like the Barnes TTSX punch above their weight, for example...in theory, a 150g TTSX has the same effect on game as a regular 165g bullet due to the weight retention and expansion characteristics of mono-metal bullets.
If this is true, you can sort of get the best of both in the "speed vs. weight" question...a fast moving 150g bullet that has the terminal performance of a heavier bullet.
Can anyone with actual experience with these mono-metal bullets verify this as true?

I've killed many hundreds of animals with the mono-bullets and here's my thoughts on them punching above their weight. They don't. What they do do is generally out penetrate lead bullets, which is fine if you need it. If you don't and you probably don't, then you are trading something that you can use for something that you don't need. I used Barnes against the most ordinary of lead bullets on culls where I could sometimes shoot 50 a day, and there is no way that anyone could have seen what I've seen without believing what I believe. Things do improve if you can arrange to bust a shoulder or two.

Upping the speed with lighter bullets in a cartridge does help, but why stop there? Why not shove them in a big case and really get some speed? I ran TSXs up to 3500 in an STW, and many about the same in a .257 Weatherby. Last year for fun I cranked 80 grain TTSXs up past 3900 fps and popped a whitetail through to shoulder at 60 yards. It ran, which was about what I expected. How fast is going to be fast enough?

A bullet not being my favorite is a long ways from being useless and I still use mono bullets for some things. Still the best for shooting through animals lengthwise for instance, and if you don't mind pegging two shoulders on a broadside shot it all works out OK.(Never mind that you can say the same about a .303 British with military ammo;)) Great for killing the animal behind yours. They rule the roost for animals that you want to die somewhere else, or collecting tracking stories or watching things die up close. They are a great bullet for animals that make a moose look small. For everything else I prefer to leave the lead in my bullets.
 
I've killed many hundreds of animals with the mono-bullets and here's my thoughts on them punching above their weight. They don't. What they do do is generally out penetrate lead bullets, which is fine if you need it. If you don't and you probably don't, then you are trading something that you can use for something that you don't need. I used Barnes against the most ordinary of lead bullets on culls where I could sometimes shoot 50 a day, and there is no way that anyone could have seen what I've seen without believing what I believe. Things do improve if you can arrange to bust a shoulder or two.

Upping the speed with lighter bullets in a cartridge does help, but why stop there? Why not shove them in a big case and really get some speed? I ran TSXs up to 3500 in an STW, and many about the same in a .257 Weatherby. Last year for fun I cranked 80 grain TTSXs up past 3900 fps and popped a whitetail through to shoulder at 60 yards. It ran, which was about what I expected. How fast is going to be fast enough?

A bullet not being my favorite is a long ways from being useless and I still use mono bullets for some things. Still the best for shooting through animals lengthwise for instance, and if you don't mind pegging two shoulders on a broadside shot it all works out OK.(Never mind that you can say the same about a .303 British with military ammo;)) Great for killing the animal behind yours. They rule the roost for animals that you want to die somewhere else, or collecting tracking stories or watching things die up close. They are a great bullet for animals that make a moose look small. For everything else I prefer to leave the lead in my bullets.

This put a smile on my face!

Anyway, as a long time .308 hunter, I prefer 165's and 180's in my .308's, and preferrably boat-tails. While I've killed lots of game with the .308, anyone honest will admit the case is a bit small and anything you can do to preserve energy, like having a real slippery bullet, is a good idea, in my books.

If I want to shoot bullets in the 150 grain range, any of the .270's I've owned over the years are better suited to that than a .308.
 
I've killed many hundreds of animals with the mono-bullets and here's my thoughts on them punching above their weight. They don't. What they do do is generally out penetrate lead bullets, which is fine if you need it. If you don't and you probably don't, then you are trading something that you can use for something that you don't need. I used Barnes against the most ordinary of lead bullets on culls where I could sometimes shoot 50 a day, and there is no way that anyone could have seen what I've seen without believing what I believe. Things do improve if you can arrange to bust a shoulder or two.

Upping the speed with lighter bullets in a cartridge does help, but why stop there? Why not shove them in a big case and really get some speed? I ran TSXs up to 3500 in an STW, and many about the same in a .257 Weatherby. Last year for fun I cranked 80 grain TTSXs up past 3900 fps and popped a whitetail through to shoulder at 60 yards. It ran, which was about what I expected. How fast is going to be fast enough?

A bullet not being my favorite is a long ways from being useless and I still use mono bullets for some things. Still the best for shooting through animals lengthwise for instance, and if you don't mind pegging two shoulders on a broadside shot it all works out OK.(Never mind that you can say the same about a .303 British with military ammo;)) Great for killing the animal behind yours. They rule the roost for animals that you want to die somewhere else, or collecting tracking stories or watching things die up close. They are a great bullet for animals that make a moose look small. For everything else I prefer to leave the lead in my bullets.

Agree... well said.
 
I used to use 150s on deer and 180s on moose. one year we found the 150s were doing a lot of meat damage, so we decided to switch to 180s for everything. Deer are easy to kill and the 180s do the job with a lot less fuss.

My suggestion would be 180s for everything.
 
My Ruger 77 full stock 308 loves the 220 rn hornady or Sierra, not sure of the speed but shoots well out to 200 and kills just fine.
 
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