quote:

Warrior, in the big bore forum Michael tested the Remington wonder bullet. Like some other bonded bullets it can over expand with velocity which limits penetration on big animals.

Quite so at magnum inpact velocity, shoot them at practical hunting range and see the improvement, shoot them with 'standard' calibers like a 30-06 Spr and watch the bullet performance improve further when impact velocity has droped dropped down to 2100 to 2300 fps. Impact velocity is critical and as I have mentioned earlier, a mere 200 fps can make a huge difference.

Here is an example of the difference between impact velocities of 2,000 fps and 3,000 fps:



These Core-Lokts are not super tough bullets like the North Forks. On bigger and tougher game one is well advised to rather pick a NF, which is essentially what Micheael suggests.

Warrior

To add to my above post, those bonded bullets that arrest expansion earlier by way of partition (Nosler Gold, Swift A-Frame) or by Sold Shank (North Fork, Rhino) and which feature much thicker jacket walls, it stands to reason that they are tougher or more durable. Their petals are more sturdy and their weight retention ratios are higher. They are a class above.

Here is an example of a report that came in on the .277/150 gr Rhino bullet, and I quote:

"From: Shorten
To: rhbullet@mweb.co.za
Sent: Monday, August 18, 2008 3:18 PM
Subject: .270 Bullet performance Gavin Schultz

Howzit Kobus

Herewith photos of another impressive bullet. Kudu bull shot at 240 m ; 270 - 150grain ; S365 - 51.5 grains.
Clover leaf groupings - slow shooting. Retained weight 148.5 grains.
Bullet shattered bulls neck , penetrated fully and lodged in shoulder.
BRILLIANT.

Cheers

Gavin Schultz"


Warrior

quote:

Originally posted by Warrior:
Remington developed and re-designed their Core-Lokt bullet and now offer a superior product to discerning hunters - it is called the Core-Lokt Ultra Bonded. Being a bonded bullet, it affords much better weight retention than conventional lead-core bullets. The Core-Lokt Ultra Bonded features a progressively tapered jacket design, which better controls expansion to 1.8 times of original diameter. Clearly Remington identified this need to offer a better hunting bullet, combining the 3 aspects that need to be balanced - an expanding bullet to form and keep its mushroom shape, affording deep penetration through adequate weight retention and a bullet that does not over expand to inhibit penetration. Bullets are all about a balance between integrity, expansion and penetration.

Warrior

These improved bonded Core-lokt bullets are made by Swift Bullet company. I learned this the other day while talking with the Ballistics Manager for Swift.

Of the three, I'm a Hornady Interlok fan, from 243 to 338. I really haven't been impressed with seirra or speer so far.

Many bonded bullet brands still over expand. Over expansion is the biggest inhibitor of penetration despite a high weight retention ratio - Mo/xsa. That is why a high striking velocity is not ideal for this genre of bullet.

Warrior

I shoot the Sierra pro hunter 175gr in 8x57. It is hands down the most accurate bullet I've used. VG penetration, through and through on big whitetails. I have found fragments when it hits bone. Not a tough bullet, but adequate for the task. I am trying out Barnes 160 and 180gr offerings for larger game. I use the Hornady interlock or GC cast lead over the Speer in 9.3x57. I decided to check out the Barnes in 8mm since it has done very well in my 7mm Rem Mag. I don't own a .270, but my 6.5x55 Husqvarna 1600 does outstanding w/ Hornady 129gr interlocks. They seem to perform better than 140gr at up to 300 yards at a MV of 2800+- FPS.

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I shoot the Sierra pro hunter 175gr in 8x57. It is hands down the most accurate bullet I've used. VG penetration, through and through on big whitetails.

Thank you. Any problems with meat destruction or large exit wounds?