358 and 308 Bullets Question Bear Hunting

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Wipartimer my brother has shot both well if I recall. But I'm warming up to the 308 idea a bit. It can use a suppressor which is nice. No muzzle blast to distract me while I watch as back him up. Of course I want it to be his kill so I'm hoping he downs it without help.
@Alaska Luke
Go with the 358.
A lot more punch at close range and a BIGGER hole to start with.
Bob
 
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What's wrong with the Speer? Obviously it might not be ideal to smash a shoulder. But at 25 yards you freeze if the bear is facing you, you shoot when the bear isn't looking (i.e. broadside).
@Alaska Luke
Nothing wrong with the Speer hotcore. I think they are under rated. A mate shot a big billygoat with a piddly little 25/20 @75 yards with a 70grain Speer hotcore. It broke the shoulder blade destroyed the internals , broke ribs on the other side and kept going out the skin. Result 1 very dead goat.
I have used the 220grain hotcore on big pigs =s dead hogs.
You could always consult balistic studies by Nathan . He has tested a bucket load of projectiles. Easy reading and great info
I have attached where to find it
Bob
Screenshot_20210407-105015_Chrome.jpg
 

Viral_SIGness

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My brother is coming up to Alaska and the plan is to ambush a bear from a blind. Could be a 200 pound black bear or a 400-800 pound grizzly.

My way question relates to HIS rifle. I will be backing him up with a 375 Ruger. I am totally happy with my rifle. My brothers choices are limited because I can't get the ammo and/or reloading components I might prefer. So here are his choices.

He could use my 358 Winchester. Load is a 225 grain Swiift A Frame going 2416 fps. Or a 220 Speer at the same velocity. My concern with these is I've never used an A frame for anything. If he takes a broadside shot through the ribs will the A Frame be too tough? The ribs of an average grizzly aren't that thick, typically black bears are whitetail sized here. Too tough could be a problem.

308 with a hot load pushing a 200 grain Partition at 2465 fps. Now I know the 308 is light but the shot will be close, probably 25 yards. So the actual impact velocity will be roughly were a 30-06 would be at 100 yards. And I know the Nosler Partition well.

There really are no other options. The 358 bullets available seem either too hard for a broadside (A Frame) or to soft for a shoulder bone (Speer) based on anecdotal repo. The 308 is a bit lighter but the bullet has better SD and should do serious damage on a broadside shot.

Thoughts? If someone tells me an A Frame will open fast and make a mess of the lungs in a small grizzly we'll do that. But I'd prefer a 308 that expands to a 358 that punches through like a solid.
I'd use a 150 or 165 grain TSX in the .308. They just look tough, when they really aren't. Why not let him use your .375 ? Does he flinch when shooting it?

On a completely different note, @Letzhunt has a .375 Ruger for sale here in the forum.
 

7x57Joe

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I used the Speer 250 grain HotCor in my .358 when hunting elk and they worked to perfection but, I hunted black timber and the ranges were less than 75 yards. I believe in your situation with only the 2 bullets mentioned for the .358 either will provide exemplary performance with a well placed shot.
 

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