The 7mm Mag is almost as good as the .30-06 if you can get it to handle heavy bullets & get the bullets to remain in one piece.
Anyone who contends sub-30 cartridges are inadequate for elk either have very little or no experience with them or they are lying through their teeth. In either case they ignore the many tens of thousands of elk successfully taken with such cartridges every year.
My elk hunting mentors used 7mm Rem Mags and had done so successfully for many years when I chose mine in 1982. Mine has never disappointed. The 7mm RM was my only real elk rifle for 20 years and most of that time I shot 160g bullets at less than 100fps over 7mm-08 velocities. My hunting buddy got his about 10 years ago and his has worked flawlessly as well. Since 1982 I have seen a lot of .270’s used and have no problem with their ability, either.
I agree that a .243 is on the light side and is best used in the hands of an expert – indeed I often recommend a .30-30 with 170g bullets over a .243 Win for youngsters. The .257 Roberts wouldn’t be my first choice for elk but with 120g Grand Slams, Partitions or A-Frames it is not an unreasonable choice for shots out to 300 yards. The .25-06 is a better choice and the .257 WBY is pretty authoritative. The 6.5’s with heavier bullets will easily do the job and the .270 Win with good 130’s or better is a perfectly fine choice although my counsel is generally toward the 150’s when using standard bullets.
You get quite a bit more recoil for nothing.
As so often is the case, you are completely full of it – lots of opinion wrongly cited as fact. Demonstrably so, as actual comparisons show.
Below are some numbers for the .30-06 and 7mm Rem Mag using data from Nosler’s ‘Reloading Guide 6’. All loads use Reloder 22 powder and Partition bullets. The BC’s of the bullets, as stated by Nosler:
.474 = .308/180g
.410 = .308/165g
.475 = 7mm/160g
.434 = 7mm/140g
For recoil calculations a 8.3 pound rifle/scope combination is assumed. Zero is for MPBR (Max. Point Blank Range) assuming a target 6” in diameter.
Load Powder Velocity Recoil Zero/MPBR 400yd drop/FPE
.30-06/180 61.0g 2872fps 24.66fpe 245/288yds -16.8”/1875fpe Highest recoil, most drop
7mm/160 63.0g 3058fps 23.55fpe 258/303yds -13.4”/1920fpe
.30-06/165 63.0g 3002fps 23.91fpe 251/295yds -15.5”/1730fpe
7mm/140 67.5g 3340fps 23.52fpe 279/327yds - 9.9”/1935fpe Least drop, most energy
If you take a look you will see the 7mm RM delivers more energy at 400 yards with less drop – and with less recoil. Could be why so many smart hunters have chosen the 7mm Rem Mag over the years.
Magnums are unnecessary in North America.
The logic that comes to that conclusion could just as easily come to the conclusion ‘Magnums’ are unnecessary anywhere in the world. There is often a benefit to using them, however, and absolutely nothing wrong with doing so.