For many years(years ago), I was a fan of fragmentation and killed my share of deer with the standard cup/core bullets available at the time. A Nosler Partition(.270, 150 gr) put my first elk on the ground with a broadside, pass thru shot to both lungs at about 150yds. After a 400 yd blood trail, my son and I found the elk. Upon gutting and doing some investigating, the lungs had merely a small hole thru both. The entrance hole in the hide was tiny as expected but so was the exit. Thank God for trailing snow.
The next year one mule deer buck needed a second shot and another needed a second and a third(.270, 130gr Nosler Ballistic Tip). One buck was hit high in the shoulder broadside on the first shot at about 200yds. The second shot hit the lungs broadside. When I reached the deer, I saw that the first shot had disintegrated against the shoulder blade without any penetration at all. All the meat around that shoulder had to be discarded because of the terrible bullet fragmentation. The second bullet destroyed the lungs, fragmented and only the jacket was recovered.
The second deer had been hit too far back by my hunting partner. Gut shot. Thanx again for snow. While trailing the deer, only I could see it when it did jump up so I took the shot - twice. Both shots hit the young buck in the front shoulder broadside but he didn't fall untill the second shot which was actually the third bullet to hit him. We skinned the deer back at camp and discovered that my first Nosler BT disintegrated against the shoulder(again)with no penetration at all. My second Nosler BR barely made it into the lungs. This explains why we waited yet another 10 minutes for the deer to die. It would seem we had to wait for the deer to bleed to death. My partner said he threw all the meat away around the front shoulder I hit with my first shot.
These were not my only bad experiences with cup/core non bonded bullets but this led to the start of my bullet education and some extensive testing by myself. The Barnes X bullet was brand new and they sent me some for testing. So did Jack Carter(Trophy Bonded Bear Claw) and Lost Rivfer bullets and many other basement bullet makers. These guys were the roots of today's super premium bullets.
1992 found me in WY with three mule deer tags and a rifle loaded with 140gr Trophy Bonded Bear Claws. 3 mule deer with 3 shots, all dead like you turned off a light switch. No trailing, tracking or sitting by watching them bleed to death while contemplating putting a 'finishing off' shot into them..
Since then I've killed plenty of big game with TBBC bullets, Swift Scirroco bullets, Swift A-Frame bullets, Jensen bullets and Barnes X bullets. There are many more super premium bullets available to both the handloader and factory ammo shooter. Right now I'm working up loads for Barnes TTSX and MRX bullets for my 30-06.
There are two schools of thought on bullet performance: Fragmentation and Retained Weight.
I am a firm believer in the Retained Weight theory. I became a believer by first hand experience, not by glossy page adds on websites, magazines or by watching the Best of the West on TV.
Something that's been missed in many of the above posts is the fact that when a bullet mushrooms but retains it's weight(bonded core/jacket or solid expanding), velocity is also retained, much more than a bullet that has lost 50% of it's weight. Velocity kills, period. Fast. Hydrostatic shock is devastating. It's a super violent explosion inside of an animal that is not surviveable. Lights out, dead right there, right freakin now is a fact. Watch some of the ballistic gelatin bullet videos on various websites or You Tube.
Tiny fragmented pieces do not have enough weight to penetrate bone, muscle or internal organs. That is why most fragments are found scattered just under the hide on the near side.
A hydrostatic shock wave is caused by all bullets upon impact in game but this funnel shaped wave stops quickly with bullets that fragment, lose weight and velocity. This same funnel shaped wave continues much farther with a bullet that has retained most of it's weight, many times completely to the hide on the off side with the bullet exiting. This means that the MOST possible damage has been done. Anything short of this means a short fall on the bullets part.
Broadside shots are the best when you can get them but it's darn rare. More likely are quartering, raking, frontal or even Texas heart shots. Many of these opportunities cannot even be ethically taken with a lesser bullet. Last year I took a Texas heart shot on a nice 4pt muley because I knew ethically that my bullet was up to the task.
I'll probably get crucified for this but to be perfectly honest, I cannot understand why anyone would want to use any bullet that is not bonded or solid copper expanding in this day and age with everything that has been done to prove their excellence.
Choices: Trophy Bonded Bear Claw, Trophy Tip, Swft Scirroco, Swift A-Frame, Fusion, Deep Curl, XP3, Barnes TSX, TTSX and MRX. I'm probably missing a couple and I apologize for that.
IE: Big muley buck, frontal. Bang - dead. Bullet entered sternum. Exited next to anus. Re-entered inside upper back leg and lodged in knee - Swift Scirroco II, .270, 130gr.
I'm referring to 200 - 250lb field dressed mule deer.
Whitetail doe. Frontal. 270, 130gr Barnes X. Entered brisket. Exited utter. Re-entered ham. Bullet recovered in knee. Deer died within feet.
Muley buck. Frontal. Head down feeding. Bullet entered at about the 3rd vertebrae with head lowered and was recovered inside of a vertebrae at the pelvis. Stone dead as the bullet went the entire length of the spine. 140gr TBBC, 270 cal.
Whiteatil buck. 270, 130gr Jensen J-26 bullet. Broadside through both shoulders and exited. Lungs destroyed. Lights out right now. Not a wiggle.
Another muley buck, this year's, Texas heart shot. Died within yards of hit. 30-06, 150gr TBBC. Entered just below rectum, broken right front shoulder. Bullet lodged in shoulder.
Another good muley buck. 150gr TBBC out of my 30-06. Broadside. Shot thru both front shoulders and exited. Lungs were liquified. Dead right now.
I can go on and on but I'll say this, if you're still stuck on your old fashioned cup/core or non bonded partition style bullets, you owe it to yourself to try some of todays super premium bullets. You'll be a believer after your first hunting trip, I garrantee it. Most shoot like match grade bullets but kill game like you turned off a light switch.