cal 223 bullet which can tumble upon entering target?

I disagree that the .223 or any rifle bullet is designed to tumble. This is an undesirable effect that seriously destroys accuracy. Game bullets are designed to mushroom. Tumbling presents a key-holing effect likely caused by an inappropriate rifling twist for the weight of the bullet. That's why you can't stabilize a 70 grain bullet in the old 788 Remington 22-250.

Varmint bullets are extremely poor choices in your AR-15 for deer. They are too frangible, that is to stay they won't hold together well enough to penetrate deeply. Their purpose is to disintegrate upon stiking a small animal such as a prairie dog. A 55-grain pointed soft point bullet, however, can account for spectacular kills on deer, and is often recovered with perfect little mushroom shapes when deer are engaged at some distaince (250 yards, for instance).

However, many deer do get away to die slow and painful deaths when shot with inferior rounds such as the .223. The AR-15 is simply not a deer rifle. Period. A bullet that does not exit does not facilitate leaving an adequate blood trail. For that reason I like two holes in my deer, a small one going in and a much larger one going out.

If you must use a .223, find the heaviest game construction bullet that will stablize in your rifle. 60-70 grain from Hornady, Speer or Nosler. The tumbling effect you are describing is not the same as the key-hole effect I'm talking about. I'm talking about a bullet tumbling in flight! And that's bad news. Any bullet that deforms on impact will tumble inside the target. The important consideration after that becomes weight retention -- how well does the deformed bullet stay together and therefore allow enough forward momentum for deeper penetration. This is what you want.

As for military use, the full metal jacket is used so as to be less frangible and therefore cause less tissue damage. It does not "tumble" in the target. It just pokes a tiny (less than a quarter of an inch) hole.

Game bullets designed for .30 calibers generally perform marvelously well as a wide variety of ranges (and therefore impact speeds). Few such bullets are available for lesser calibers. For deer, you are far better off with an old 30-30 than an AR-15.

a hundred and fifty grain is a typical , usual bullet weight for .270 rifles so it would be stabilised in any .270 rifle below in simple terms about all circumstances. As a pair of fellows have reported there might desire to be an ammo problem or a barrel problem the two one in all that are very uncommon yet no longer impossible. in case you could pull an unfired bullet out of a cartridge and degree its diameter it would be .277" and the groove diameter (no longer the land diameter) of the barrel must additionally be .277" in case you haven't any longer have been given precise measuring gadgets then take ammo and rifle to a gunsmith or the placement you purchased it and have them measured. An unfired .277" bullet won't slide by using a .277" groove diameter barrel , it ought to be compelled by using via the nice and snug gasoline from the burning powder while the gun is fired. If a bullet does slide by using in simple terms from gravity the barrel is in simple terms too extensive and can in certainty be .30.06 as Robert H pronounced or on the different hand the batch of bullets might have been undersized by some means on the manufacturing facility and so are smaller than .277" Stranger stuff has got here approximately. once you remedy this problem let us know what the problem seems to be. it incredibly is an unusual problem. Edit......A barrel without rifling ! this is a few thing that did no longer ensue to me , I even have not come for the time of that ever , very unusual as you're saying , thank you for paying for lower back to us with this information.

I am a very very very avid hunter. and i have shot a few deer with a 223 and it does seem from time to time the bllets start to tumble. but at a distance, when they start slowing down is when they start to tumble. Bu as long as you arnt shooting to far it should be fine. i have killed deer with a 22. Cal so the 223 can do it. but i would personaly recomend going larger with you'r rifle. i try not to use anything smaller than a 243. now. i only killed the deer with a 22. because my buddy bet me 350 that i couldent. haha he was wrong. but ya it should do fine.

Yes, the .223 cartridge is designed to tumble, so it causes the most damage possible in the enemy, but is not meant to kill them immediately. The logic behind this is simple: Soot a man and kill him, it takes one man out of the fight. Shoot a man and wound him, he is out of the fight as well as he fellow soldiers that carry him to safety.