Deep Curl bullets
- Thread starter Kachok
- Start date
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snuffy
Member
I just got a box of 165 30 cal. I was going to try them in .308, then I fell in love with a 100 year old rifle. An 03-A3 Springfield that's sporterized with a Redfield aperture rear sight, and also drilled & tapped for weaver scope mounts. It came home with me for $295.00!
So the tests will be conducted with 30-06 shells. I have the bullet test tube expansion system, so stay tuned to this thread for pics of wound channels and expanded bullets,,, soon.
Data is here;
http://www.speer-bullets.com/pdf/30-06Springfield_165gr_DC_2027.pdf
Speer says these are sooooo different from other bullets you HAVE to use their data. Bull! That data compares real close to other cup&core bullets of the same weight.
Chronograph data, groups at 50 yards and expansion data should tell us a thing or 2 about the rifle deep curl.
Oh, the debate about gold dot is this way the way I understand it. The gold dot has always been a copper plated bullet. The front was formed by a punch which forms the HP and leave a tiny "dot" of the nose plating in the bottom of the cavity.
As for is it "bonded" I don't think so. The plating is supposed to grip tightly to the lead core. It IS a better grip than a cup&core bullet that's formed by pressure in a forming die. The C&C bullet is famous for opening a certain amount then spitting the core, leaving the jacket behind.
If the lead core could be made with ridges on it, the plating would conform to it, gripping it strongly. But then getting the outside of the bullet smooth would be real hard.
The deep curl bullets I have are not nearly as shiny as a good C&C bullet. Looks almost porous. We will see how they shoot.
So the tests will be conducted with 30-06 shells. I have the bullet test tube expansion system, so stay tuned to this thread for pics of wound channels and expanded bullets,,, soon.
Data is here;
http://www.speer-bullets.com/pdf/30-06Springfield_165gr_DC_2027.pdf
Speer says these are sooooo different from other bullets you HAVE to use their data. Bull! That data compares real close to other cup&core bullets of the same weight.
Chronograph data, groups at 50 yards and expansion data should tell us a thing or 2 about the rifle deep curl.
Oh, the debate about gold dot is this way the way I understand it. The gold dot has always been a copper plated bullet. The front was formed by a punch which forms the HP and leave a tiny "dot" of the nose plating in the bottom of the cavity.
As for is it "bonded" I don't think so. The plating is supposed to grip tightly to the lead core. It IS a better grip than a cup&core bullet that's formed by pressure in a forming die. The C&C bullet is famous for opening a certain amount then spitting the core, leaving the jacket behind.
If the lead core could be made with ridges on it, the plating would conform to it, gripping it strongly. But then getting the outside of the bullet smooth would be real hard.
The deep curl bullets I have are not nearly as shiny as a good C&C bullet. Looks almost porous. We will see how they shoot.
Usertag
Member
Well seen them around on a .25 Auto and they are basically just Hollow Points that Expand. But the bullet stays whole and doesn't fragment. Also the core of the bullet splits with the jacket and makes the expansion look fat in width and legnth.
http://tinyurl.com/3ec8twb
http://tinyurl.com/3ec8twb
GW Staar
Member
- Joined
- Feb 26, 2009
- Messages
- 3,706
Correct. In their words, "Uni-Cor technology bonds an incredibly uniform jacket to the core—one molecule at a time." In plain English that means plating by electrolysis over and over until they have a thick enough plating that they feel justified to call a jacket...compared to ordinary plated bullets.
Electroplating has always "bonded" at the molecular level.It does work. So well that Berry's Mfg. is attempting to copy the idea with their new line of extra heavily plated Gold Dot-like bullets.
I'm hoping the Berry's attempt works, because that can only effect supply of SD bullets positively.
Seedtick
Member
Bingo! And when there is competition for market share we, consumers, get to $hare $ome of the benefit$.
I'm rooting for Berry's.
Seedtick
CraigC
Sixgun Nut
Plated bullets ARE bonded.
CraigC
Sixgun Nut
Obviously but "bonded" nonetheless.
627PCFan
Member
CraigC
Sixgun Nut
Isn't the jacket still there???
627PCFan
Member
Yup but the retained weight was only about 65 grains ifmemory servesme
http://www.thehighroad.org/showthread.php?t=553675
http://www.thehighroad.org/showthread.php?t=553675
CraigC
Sixgun Nut
"Bonding" only keeps the jacket from separating from the core. Has no bearing on weight retention. Some Gold Dots expand fiercely, others only slightly. All depending on their construction, jacket thickness and impact velocity.
Kachok
Member
Well if it is keeping the jacket attached to the core, that by itself has something to do with weight retention, usualy once the soft lead core separates it will come apart, at rifle speeds anyway.
snuffy
Member
Exactly! Now to take it to the next level. Bonding coupled with the correct core hardness, will result in weight retention. Case in point, these two truly bonded rifle bullets. A 180 Hornady interbond, and a 180 Nosler accu-bond, both fired from my Browning 300 WSM.
First the nosler accu-bond;
Then the Hornady interbond;
then both with a rem core-loct 180 Round Nose tossed in for good measure.
You can see the difference in retained weight and penetration of the two bullets. These were fired into gallon milk jugs filled with water, then placed end-to-end to see how many jugs it took to stop them. The Hornady interbond retains weight at 77%. The noslers, were around 65%, but penetrated 4 jugs.
Here's 3 165 interbond bullets that were fired the same as the 180's above. These retained 85% of their weight. Notice how the lead is clinging to the jacket. It refuses to let go. The core lead is harder for the Hornady interbonds. It does NOT shed weight like the Noslers. The expansion is also bigger on the interbond, which is why it doesn't penetrate as well.
interlock
Member
... anyway, i like the look of them too
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