Wyatt Smith
AH legend
There is no way I would hunt anything dangerous with a 64,000 PSI load. It leaves too little room for error. If you want 2600 out of a 286 get the 9.3x64.
There is no way I would hunt anything dangerous with a 64,000 PSI load. It leaves too little room for error. If you want 2600 out of a 286 get the 9.3x64.
This being said, can modern propellant, modern bullet and modern loading techniques raise the 2020 9.3x62 to the level of the 1920 .375 H&H? Of course! But again, let us not be too myopic, the same components and loading techniques applied to the .375 H&H keep the 2020 .375 H&H 20% above the 2020 9.3x62.
BOTH can be made faster if one does not mind pressure and sticky extraction
Sort of the same discussion as between the .416 Rem and .416 Rigby. Can the Rem run up the Rigby at max load? Sure! Have you tried to extract one of these loads in the hot sun of Africa?
... “there is no replacement for displacement”.
The 416 Ruger, SAAMI max is 62,000 psi.Pressure...
Not to be argumentative either - this is a legitimate discussion - I am not using "old data" hawkeyesatx, Swift currently load their 286 gr to 2,396 fps; Hornady to 2,360; Federal to 2,360; Nosler to 2,400; etc. These are all current loads.
Let me add that, yes, they are likely loaded to 56,500 psi, which is the standard for the cartridge. So, let me agree that can handloading increase a 286 gr velocity another 100 fps to 2,500 fps while staying in the 62,000+ psi range? Probably. But what pressure do you get for a 286 gr with another 200 fps to 2,600 fps? I do not know...
I notice that the Swift Reloading Manual indicates a maximum load at 2,350 fps for a 300 gr. At what pressure does it operate? I do not know. Can handloads exceed maximum loads listed in the manuals? Sure! At what pressure? I do not know... Can a 300 gr be loaded to get another 200 fps to match the 375 H&H? Maybe? At what pressure? I do not know, but probably pretty high...
Your take on the shoulder shape improving markedly how powder burns has certainly been discussed for eons, going back all the way to Roy Weatherby and P.O. Ackley, and certainly, a short, fat powder column, contained by a sharp shoulder, and that burns inside the case, is preferable to a longer thinner powder column that burns in the barrel, and if you can still chamber the round - which came as a surprise to those who jumped on the Winchester Short Magnum bandwagon - there is indeed an internal ballistics advantage. So, from this perspective, does the 9.3x62 have a better shaped case than the .375 H&H? Undoubtedly.
However, in your statements, you may attribute the bulk of increased velocity to the wrong factor:
Sure, the .375 Wby and the various Ackley improved designs likely provide some additional velocity because of their sharper shoulder, but the reality is that they mostly do so because of increased powder capacity.
- "the .375 H&H case has been tapered less, and given a sharper shoulder, to make it a lot more efficient. Hence the .375 Weatherby, and other wildcat designs based on the case to drive velocities higher in the .375 caliber."
- "Ackley is best known for his “IMPROVED” cases, which helped to make a cartridge more efficient in the way that it burned powder, and thus increased velocities over normal cartridges."
Oceans of ink have been spilled over whether the Weatherby "double venturi" shoulder has any effect on velocity, and numerous tests have been conducted, and yes, there are some indications that sharper shoulders likely contribute some additional velocity, but folks who knew R. Weatherby and P.O. Ackley will tell that Roy designed his famed shoulder not for velocity - he relied on gobs more powder for that - but for marketing uniqueness and to prevent any and all local gunsmiths to grind a reamer for his cartridge so that he could sell complete rifles himself............... and that P.O. (Parker Otto) used sharp shoulders not for their shape but because they cleared up just a tad more space for still more powder...............
I do not think that I missed where you said "Did anyone miss where I said that the .375 H&H can, and does benefit from the newer powders, as well?" In fact, I wrote:
But you may have missed what followed:
I confess that I entirely miss the passionate argument about a 2020 9.3x62 load equating a 1920 .375 H&H load performance. This may be because I do not shoot many 1920 .375 H&H loads, and also because this seems entirely obvious to me. Of course, powders have evolved over the last century, I do not think many would argue over this one.
As to going to estimated 64,000 PSI (key word: estimated, what would actually be the measured pressure on the load?) and above (how far above?) IN THE US, it brings to mind a study that Sierra conducted a few years ago. If memory serves, their conclusion was that .308 ammo at 130°F shot ~100 fps faster than ammo at 70° F. I remember being surprised because I had thought that temperature issues were obsoleted with the shift from cordite to modern powders - and this is generally true enough for normal pressure loads - but the reality is that Africa's sun is still an issue with loads pushed to the pressure edge in the US.
What pressure does a 9.3x62 load that runs 64,000 psi? 66,000 psi? 68,000 psi? IN THE US reach by the time it cooks in the sun on your belt for 5 hours walking after DG in 110°F African weather? I do not know...
What I know is that these types of loads STILL cause problems. Please do not take my limited experience for it, but regal yourself reading the following extract from Kevin "Doctari" Robertson's Africa's Most Dangerous:
View attachment 445221
View attachment 445222
View attachment 445224
Please observe that the .416 Rem operates at 62,000 PSI, so it actually develops LESS pressure than the 64,000 PSI you estimate (key word: estimate) for a 286 gr load, and the what? 66,000 psi? 68,000 psi? a 9.3x62 300 gr load at 2,550 fps (the true equivalent of a .375 H&H load) would develop.
Your comment about the 9.3x62 headspacing thankfully on the shoulder hints at case stretching, a sure sign of generous pressures...
I guess that in all logic, you could push your point to its logical conclusion and argue that the 9.3x57 is an even more efficient cartridge than the 9.3x62 over the .375 H&H because it takes even less powder, and that at XX,000 psi the 9.3x57 would do it all.
This is a wonderful free world, and you are welcome to try it, and it may actually work, but not for me thank you very much
In the end, I think Tra3 captures it well:
Sure there are some efficiencies, in internal combustion engines as well as cartridges, but when the same technology is deployed, it is hard to overcome 20% more powder capacity. Who was it who said "there ain't no free lunch..."
I will continue to love the 9.3x62 as the best medium bore caliber for my recoil sensitive wife to hunt Buffalo, and I will continue to love the .375 H&H as the best medium bore to take a frontal brain shot on elephant, both with loads that allow opening the action in December in Zimbabwe, Botswana or Tanzania.
This is all true. One might say it is almost as good as a 375H&H.The 9.3x62 still is regarded by South African hunters as generally satisfactory for any dangerous game in Africa.
The 9.3x62 has killed so many elephant, Cape buffalo, rhino, and the big cats that one could quote reports from old writings and from as recent as the last hunting season - that describe the exact same way it penetrated and killed whatever was hunted (mostly Cape buffalo). It is an established elephant and buffalo killer. If the hunter has the knowledge of the animal's anatomy - as every hunter should have of every animal he plans to kill from small to big - a 286 gr solid bullet from the 9.3x62 at impact velocity of 2,300+ ft/sec at 30-40 yards will penetrate the heavy shoulder bone of buffalo and elephant and kill it. A soft bullet with large frontal area expansion will not - which is also true for the .375 H&H, or .416 Rigby, etc.
This is how John "Pondoro" Taylor sums up the 9.3x62 in his classic "African Rifles and Cartridges". The majority of posters on rifle forums can learn from this sober viewpoint that Africa professionals had as was expressed by Taylor. If a cartridge is generally satisfactory, and if another cartridge (or a few others, as is often the case) are also generally satisfactory there is absolutely no need for the mostly boring and invariably less than psychologically adult bickering and inconsequential hair splitting just to defend the writer's biased opinion.
Hawk
He also said:Long years of experience have shown that the various weapons in the .450-.500 group have all the power necessary to enable you to safely tackle any animal anywhere.
In thick cover you cannot pick your shot; you must take what the gods offer you and be darned glad to get a shot at all. A small bore is no use for those conditions—it cannot be relied upon to smash massive shoulders and hips. It's no good drilling a neat little hole thru the shoulder-blade if you want to anchor your elephant with certainty; you've gotta bust it.
...All hunters know by this time that the shoulder-shot is the best where all other animals are concerned, since it's the biggest, steadiest, and most vulnerable target; then why not in the case of elephant? Anyway, I always use it when the conditions permit; and prefer it for elephant just as I do for any other beast. The 480 and 500-gr. slugs are fine for this.
If you are going to quote Taylor he also said:
He also said:
I have actually done this on an elephant with my .500 MDM shooting a 500 grain CEB solid at 2,350 fps. Elephant after being shot on the right shoulder, laid down after a while and I finished it off with a heart/lung shot. With a 9.3 or a .375 that first shot would not have done anything.
I like 9.3 caliber, it worked great on my recent Leopard hunt for bait and Leopard. However, I would not use anything under .400 caliber for buffalo or elephant. Though, I have taken all with much larger calibers to date.
My point is "horse for the courses". Instead of trying to load a 9.3 caliber hot and hope it performs without malfunctions I'd rather move up a few calibers and "Use Enough Gun" for thick skinned dangerous game.
...
Those of us who are only able to afford one rifle, and cartridge that can hunt Africa, we can use the 9.3x62.
If I were independently wealthy, or had a job that I make 6+ figures, then I would have battery of African rifles of larger caliber, and hunt there every six months. But as I am not, then I will use my 9.3x62, and use my hand loads to great effect.
...
If someone is going on a full bag hunt in Tanzania, or an elephant in Botswana, then an upgrade to a .4XX may very well be a rounding error. And if you can afford those hunts, you can afford the 4-5k minimum round up for a fail safe dg gun.9.3 can NOT hunt all of Africa unless you limit it to PG and cats. If you are going to hunt elephant, or even cape buffalo then cost of the hunt in a free range country is such that a few thousand dollars extra for a true big bore is a rounding error for the most part.
If limited to one true rifle with 9.3 ballistics in regards to trajectory for Africa and no belt then a .404J could be an option as it has the same range but hits much harder. Various .4XX magnums will do the job as well.
The 416 Remington SAAMI is still 65,000, even if ammunition manufacturers have backed off.
...
But then there is the average joe demographic that may be able to scrape together enough scratch over ten years for a $15k 7 day Buffalo or tusk less in Zim. This is the CZ550 or Model 70 crowd. They might also have an $800 Zastava in 9.3 and can’t afford or don’t want to buy another gun.
“Rounding up” can make or break a lot of peoples dream hunt.
You got me there. In all honesty I don’t know all the energy requirements because I bought a 375 which is universally allowed. We can swap out Zim for Moz then.9.3 does NOT make the minimum 5,300 joules (3909 ft-lbs) for buffalo and tuskless in Zim, falls short by almost 700 ft-lbs. I'd also submit that if one is going to an Elephant hunt the firearm effectiveness and quality is not something one should skimp on. Maybe scratch for 11 years instead of 10 and get an effective gun. Remember trophy fees are paid the moment one wounds an animal whether it is recovered or not.
Hunting animals that require a caliber that starts with a 4 isn't cheap either. If one can afford one...they should be able to cover the other.But as a rule, rifles that start with a 4 don’t come cheap. A new gun isn’t in the majority of peoples budgets. (I’m speaking from experience)