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#Post#: 1067--------------------------------------------------
Controled Expansion
By: bigjromero Date: October 11, 2012, 8:54 am
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So, the expansion of all hunting bullets is controlled by their
design. Bullets made for shooting varmit with a .223 or smaller
have very thin jackets scored at the front to ensure explosive
upset on impact. Softnose bullets for deer hunting have thicker
jackets so they don't come apart on contact but penetrate the
deer's vitals more or less intact.Bullets that are designed for
heavy game like elk are commonly called "controlled-expansion"
(CE) bullets. To reduce fragmentation they might have a
midsection dam of jacket material (Nosler Partition, for
example); thick, ductile jackets tightly bonded to the lead core
(Trophy Bonded); a solid copper construction (Barnes X); or a
hard heel section and softer nose (Speer Grand Slam). Other CE
bullets feature a combination of these designs (Swift A-Frame,
Norma TXP and Winchester Fail Safe) where we hunt and it is
thick and beneficial to create good blood trails, we are trying
to get bullets that hold togeather and bust through.
The recent availability of many CE bullets in factory ammo has
given hunters almost too many choices, made all the more
confusing when manufacturers attach other labels to the boxes
(Winchester Supreme XTP III, Federal Premium Cape-Shok,
Remington Premier Safari). And this before you even identify the
cartridge or the weight of the bullet.
Bullets designed for deep penetration in big game are not, as a
rule, a more accurate alternative to their standard softpoint,
hollowpoint and polymer-tipped brethren. That was true back when
Remington announced its Core-Lokt--even company engineers
admitted it! They were quick to add, though, that Core-Lokts
(like most CE bullets today) shoot more than accurately enough
for big-game hunting. No deer hunter would choose a bullet that
shot into an inch but performed unreliably in game over a bullet
that printed 2-inch groups but opened perfectly and drove deep
every time.
The ordinary Sierra softnose and hollowpoint hunting bullets,
Hornady softpoints and Nosler Ballistic Tips, which typically
shoot small groups, also deliver lightning-quick kills on
deer-size game. THESE BULLETS FRAGMENT They dump all their
energy instantly, opening huge holes in the chest rather than
zipping through, and leaving a bloodtrail, A
controlled-expansion bullet is best if you get a quartering-away
shot or must smash the point of the shoulder to land your
smaller caliber bullet in the boiler room. But hopefully, you'll
have the neat and humane option of a shot through a deer's
forward ribs.
This year I am using an Nosler Accubond 140 grain in my .270 win
mag it looks to dump alot of energy on impact but it seems to
hold togeather well enough to bust through and give blood trail.
I am hoping for good results and I am hoping to not have to
trail any animals this year. What bullet are you guys using
this year?
Everyone has their own opinion I gathered mine from research on
the following sites:
www.wikipedia.com , www.hornady.com , www.Remmington.com ,
www.sierrabullets.com , www.federalpremium.com , www.nosler.com
, www.winchester.com , www.barnesbullets.com
#Post#: 1071--------------------------------------------------
Re: Controled Expansion
By: TexanTiger Date: October 11, 2012, 1:30 pm
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I'm actually making a switch this year from my Winchester 130
grain Ballistic Silvertips to a Federal 130 grain Sierra boat
tail soft point for the .270. I've had good experience in the
past with the BTSP in .243, and I'm hoping that will carry over.
I'm switching because of an article that I read a while back
that talked about different rifles "liking" different brands of
ammunition more than others. After mulling it over, I went out
and bought a few boxes of the traditionally popular 130 grain
.270 rounds from a few mainstream manufacturers (Remington,
Federal, Winchester, and Black Hills all made the list), took
them to the range, and fired test groups. Sure enough, my rifle
seemed to like Federal ammunition the best, and after testing a
few from the line, I found that the BTSP put up some impressive
1/2" to 3/4" groups. I always hope to not have to trail one at
all, or very far if I do, but I'm anxious now to see what it
does on flesh.
I will say that the Silvertips have a very controlled expansion.
I've fired one through both front shoulders of a deer, dropping
him on the spot. I've also shot through the brisket on a deer
facing me, and found the round in the liver after following a
trail of organ carnage through the ribcage.
For my brush gun, I'm sticking with my Marlin .357 lever action.
I shoot a 158 grain semi-wadcutter soft point. Every deer I've
ever shot with that round left buckets of blood behind, which is
great when you're in the really thick stuff where they like to
hide. I had a horrible experience with Nosler Partition bullets
in that gun. I just don't feel like the .357 in an 18" barrel
gets enough force to effectively expand that bullet, and both
deer I shot with it before I retired that round left little to
no blood trail and the bullets failed to completely expand with
shots inside of 35 yards. Granted, the rifle is a 50 yard
maximum type of deal, but it's a carbine, extremely short,
light, and quick to shoulder and fire when milliseconds count,
so it works great for me in the thick.
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