Great trade! I just went through almost the same process. While Mod 700 in 35 Whelen AI is "my one and only", I "needed" a spare that I could buy factory ammo for; a 30.06 was my choice ( although I have other rifles over in my SIL's safe, I just keep a couple on hand now) I had a Mod 700 Mountain rifle rebarreled w/a Shilen. Part of my reasoning; I had it in my heart! ha
The only Mod 70 FWT ( post 64) I could not get to shoot was in 7x57, which really bummed me out. ( I liked ol Jack O'Conner, but I also liked Ol Elmer,ha) So I sent it off ( around '93) and had a 23" Douglas Premium put on it. I got it back just a week or so before my first cow elk hunt (early Novemebr) I decided to use the then new Hornady LM 180 Spire Pt ammo. I was getting 2910 fps ( chrono checked) I shot my cow at 135 steps "running" through some aspen. Knocked her down. As I approached, she was trying to get up, so popped her around 100 high lung shot. After I "double checked" she was indeed a cow and not a spike (whew, my mind was playing tricks on me! ha) I gutted her, necropsy showed my first round had broke her spine behind her shoulder and was wadded up right there. My 2nd shot had made a big cavity in both lungs, but I found the bullet, disentgrated and had stopped insdie the far ribs. This surprised me as I had used Hornady's alot on deer, and they seemed "hard" to me. Later on, I went to the then new Federal High Energy 180 Partition. Sheboygin! I got 2970 with that load so bought 6 boxes. Shot a mule deer doe with it the following year, and then gave the rifle and ammo to a Missionary friend of mine in South Africa. He used that rifle and load for all kinds of plains game, including Eland. That's just "one" of the reasons I have an affinty for the 30.06. If I had done that with a .270, I may have felt different, ha. But I replaced that particular '06 with the Whelen, and the rest is history as they say! I have shot alote of game with handloads in different '06s through the years, but I try the hot shot factory loads too. My "next" load to try will be the Federal High Energy 180 Trophy Bonded tipped load. I find that up to around 250 ydws or so, I could not tell the diff between the '06 (with these loads) and any 300 WM I've had.
Now, the .270 is popular out here, but I played with a .280 Ackley Imp more than any 270 I've ever had. I have a neat Belgium BAR in .270 that shoots some hoarded Winchest 140 Fail Safes like a varmint rifle...its just too dang heavy for me in these mountains, ha. I think you chose right myself, and yes, Ol Jack was a snooby old fart, but I enjoyed his writings! If Elmer would have had some of those Federal High Energy 180 partitons in his springfiled, he may have felt different about the 30-06, ha.