I used the 35 Whelen Ackley Improved for a bit over 20yrs. No elk, but did take a lot of elk sized African Plains Game with it. I started with the old Barnes 250X at 2550fps. I could push it faster but it was bug hole accurate there. I only recoved two bullets, both on lengthwise shots on Kudu and zebra. Another trip, I took it with the 200X going 2970fps. Same results. Wicked, easy shooting. I'm sure the 338-06 and 9.3x62 would do the same...with good bullets. I loaded the 30-06 with Nosler 200PTs for several friends and the 168TTSX. either one are dynamite. So...a standard 35 Whelen with these newer powders will do what my Whelen A.I. did and less hassle. You only live once...and we "don't have to" make do. If "make do won't do" for you, get you one of those Mediums and get some experience with it! Have a ball Pard! smile