Ah! This word, "Perfect"...
Three thoughts to provide context:
1) The very use of the word "perfect" in the question, stimulates the thought of "cannot be improved on by a competing offering"...
2) We are talking about ONE rifle for all plains game (Duiker to Eland)...
3) We are NOT talking about a dual purpose PG / DG rifle...
In my view, "perfection' in a plains game rifle means:
- the ability to launch projectiles in a weight range of 150 gr to 200 gr (in an ideal world 120 gr to 250 gr would be preferable);
- the ability to have a 300 yd maximum point blank range (MPBR) sighting for a 8" vital area (in an ideal world 6" would be preferable);
- the ability to procure ammunition relatively easily;
- a recoil level no higher than 30 ft/lbs in a reasonable weight scoped rifle (in an ideal world 25 ft/lbs would be preferable).
The combination of all the above really reduces drastically the number of contenders!
This is going to likely trigger the usual fireworks of offended comments because i) one's pet caliber or pet odd load is not mentioned; and ii) I know that folks have killed Kudu with a .243; but it seems to me that, objectively:
- Anything below 7 mm is out. Just can't throw 200 gr at a velocity compatible with 300 yd MPBR.
- 7 mm Mag (Rem, Wby, RUM, STW, etc.) are edging the answer with 180 gr bullets.
- .30 non magnum are not fast enough to deliver the MPBR.
- .300 Win Mag meets the requirements with a 180 gr bullet but is a little shy with a 200 gr bullet.
- .338 Win Mag is just a little shy of MPBR with a 210 gr bullet and drops fast with a 225 gr or 250 gr bullet.
- Anything significantly larger than .33 is uselessly powerful on plains game, although Eland can soak up lead like a sponge and a .375 is always welcome for it.
In my view, the objective, data-based answer to the question is:
- .300 high speed Mag (Wby, RUM, Nosler, etc.). They will shoot 200 gr about as flat as the .300 Win will shoot 180 gr; or they will add 20 yd to the MPBR of a .3oo Win 180 gr.
- .33 high speed Mag (Wby, RUM, Nosler, etc.). They will shoot 250 gr almost as flat as the .300 Win will shoot 180 gr, while delivering a quantum leap difference in power.
Because I got into all this before RUM, Nosler, etc, existed, I am a Weatherby guy. In the name of "who can do more can do less," I prefer the .300 and .340 Wby to the .300 and .338 Win. They add 20-30 yd to the MPBR. Nothing more, but nothing less. Is it critical? Hardly. Is it more "perfect"? Objectively yes.
I have not yet decided which one is best:
- In favor of the .300 high speed Mag: it is actually two guns in one. A 150 gr Partition/TTSX/etc. will fly as flat as a .257 Wby slug (no faint praise, and no slouch of a bullet either). Perfection on the "small to medium" plains game! A 180 gr or 200 gr Partition/TSX/A Frame/etc. will kill DRT (dead right there) any plains game that walks the earth. Perfection on "large" plains game!
- In favor of the .33 high speed Mag: a 250 gr bullet will do better on the largest plains game (Eland, Giraffe, etc.) what a 200 gr bullet does. The 185 gr TTSX makes it an incredibly devastating cartridge on small and medium size plains game. Like a .300 on steroids. In the unlikely case of self-defense shooting on an unprovoked buff or lion attack while plains game hunting, it will hit them noticeably harder than any .300.
Assuming as
@BRICKBURN and
@Nyati imply, that you can shoot it well, and for the same reason stated by
Red Leg, with the caveat that the Wby version will outdo the Win version by 250 fps and 20 yd,
It hits with nearly the same sort of authority as a .375, and has the reach of a .300.
my own one-gun plains game safari rifle, as most of you guys know, is a stainless/kevlar .340 Wby.
I have used 250 gr Partition on everything from Steenbok to Eland. I will continue to use 250 gr Partition on Eland, and after a lengthy discussion with the folks at Barnes, I will try 185 TTSX (rather than my initial thought of 225 gr TTSX) this coming July for 2 weeks on everything else.
Yep, 6.5x54, 7x57, 30-06 etc. are grand classics and have killed anything that moves; and .260, .270, .308 kill thousands of game every year. But the question includes the word "perfect." All these are light in my book on the 500/600 lbs+ plains game (Wildebeest, Hartebeest, Kudu, Sable, Zebra, Eland, etc.) and they fail the 300 yd MPBR test with reasonable weight bullets. Nonetheless, if you consider your 6.5 Creedmoor "perfect" and you enjoy clicking your scope back & forth endlessly, and you relish tracking forever wounded game that does not produce one drop of blood, have at it, this is a free country ... just not my cup of tea ;-)
PS: for simplicity of discussion, I associate 8 mm, .318, etc. with .300; and .325, .35, etc. with .33 in this discussion. Give or take a few gr, a few fps, and a few yd in MPBR, they are all the same ;-)