The x74 is a different beast than a x62.
The x74 is almost the equivalent of a 375HH. It is not legal for DG use in most of Africa (falls below 375 lmiit)
I believe everyone findings on their velocity claims. I thought it funny that G&A posted extensive article with velocity falling low 2300FPS with 286gr loads with similar rifles as everyone is posting. The stuff they post is usually accurate.
I have more than one 9.3x74R, and i've shot more than a thousand rounds of 74R's, many over a chronograph... They push the same 286 grain bullet as the 9.3x62 at about the same velocity... There's no magic here, the 62 is normally loaded to higher pressures for bolt guns... The 74R is "normally" kept to 2300 to 2350 because most doubles are regulated for that velocity, and there's a LOT of old 74R guns floating around...
As for the "375" rule... It all depends on where you hunt and who your hunting with... Go read what's going on... It's happening all the time... I'll cut/paste one of many post i read a couple days ago, to here...
DM
And i quote: I own a 9,3x74R double rifle, a 450/400 3 1/4" double rifle and a 450 No2 double rifle.
I have taken quite a bit of game with them.
I have taken deer and wild pigs with all 3.
Black bear with the 9,3 and the 400.
Two Caribou with the 400.
Two eland and a wildebest with the 450.
Twenty four zebra with the 9,3, one with the 400.
Several smaller African game with the 9,3, including @14 Impala.
Three cape buff with the 450, one with the 400 [my wife took one with the 400 as well] and one with the 9,3.
Five elephant with the 450, one with the 400, and one with the 9,3.
A lion with the 400.
So my following assesment is not biased toward any one calibre, but my observations and feelings after using all three.
My 9,3x74R loads consist of 286gr Softs [Woodleigh and Nosler in Africa] and 286 Woodleigh Solids at @ 2225fps.
The 9,3 is an excellent killer. My longest mshot was a kudu at a little over 300 yards.
My closest a cow elephant at 5 yards.
My cape buff was killed with one shot, Woodleigh Soft, frontal chest at @60 yards. He was down and dead in 40 yards. He is the biggest in body and horn that I have taken.
I do consider the 9,3 [amd the 375 as well] to be on the light side for buff and elephant.
Well handled it will get the job done.
The only hunt I would not want to use it on is hunting bull elephants for ivory, where it might be necessary to take a body shot.
For head shots no problem.
The 450/400.
I consider the 450/400 the best choice in a big bore double for the modern sport hunter.
Mine is now scoped with a S&B 1.25-4 with the Flash dot Reticle. My 400 gr bullets, Woodleigh Softs and solids, go @2200fps.
The 400 has quite a bit less recoil that doubles in the 470 class, they are very plesant to shoot.
My results on all game shot, including bull elephant, cape buff, and lion were excellent.
A 9,3 double, and a 450/400 double, both scoped would make an EXCELLENT pair of rifles for Africa where DG will be taken.
The 450 to 475 class of rifles.
There is no doubt these guns are a bigger hammer than a 450/400, 500/416.
If you can shoot a 450 to 475 like a 22LR, then they are a great choice.
My 450 No2 is my favorite rifle of all time.
On my first Safari my PH called it the Hammer of Thor.
On my all of my 3 Safaris I took the 9,3 and the 450.
On my last Safari my wife "took" the 400 and I used to to take a cape buff, bull elephant and lion, as I wanted to have taken buff and elephant with all 3, and with the scope it was a natural for lion. I used the iron sights for the buff and elephant.
The 450/400 is a big step up from a 9,3 or a 375 IMHO.
I am a big fan of British big bore doubles, however, not long ago I shot the new Heym 450/400 3".
I think it is the BEST choice in a new made double for the modern sport hunter. I would have mine scoped with a Swarovski or S&B [one of the the straight tubed objective models with illuminated reticle] in claw mounts.
IF you can handle a 450, 475 class of double like a 22LR, and plan to shoot a LOT of elephants, then the bigger double would be a better choice.
For most Safari hunters the 450/400 would be a better choice. Especially scoped.
ANYTHING I could do with a scoped 375 H&H bolt rifle I can do better [IMHO] with a 9,3x94R scoped double.
I feel much more comfortable in DG country with the 9,3 double vs. the 375 bolt rifle.