I have had several 35 Whelens, all but one I had Ackleyized immediately. I love the Remington 700 Classics, but I like the looks/versatility I get from the Ackley 40deg case design. I had a Mauser 98 made up into the Whelen AI for my SIL, only standard Whelen I had was a Mod 750 auto, a very accurate rifle! I used CCI BR2 primers.
I started out with the original 250X bullet over 53.5 gr of the old BR2015 powder for 2600fps. I could push it much faster, but I got extremely good accuracy with moderate pressures this way. I only recovered two bullets from several big Plains game in South Africa from that load. I came home, ruined that rifle by having it converted/rebarreled to a .416 Taylor ( a bad idea) found another 700 Classic that I had set up in AI and it too shot the same 250X load well. I then tried the 200X and I finally found outstanding accuracy and speed ( 2970) using 58gr H322 ( I now use 58.5gr with the newer 200TTSX.
+3"@100= -4"@300) I made another trip to SA, never ecovered a single bullet! Shot a Black Wildebeest at 347yds! It let me know I didn't need anything heavier in the Barnes style. I only recently made up a load with R15 and the 310 Woodleigh just to be nostalgic, and it too made a wonderful game load at 2400fps! I had no problem getting 1/2MOA with it out of the 1/16" twist of the factory remington barrel. Speed is your friend with the slower twist rates anyhow.
I loaded both the Hornady 250 and the Sierra 220 over R15 out of that Mod 750. Even though I had a .358 BLR and several 35 remington Marlins, I only have my one Mod 700 35AI now. I only hunted with my ol Whelen! I found I just like that rifle, it's Shilen trigger, the Leupold 1.5x5 for everything. I do have a similar affection for the 30.06, but only have one of those anymore too. I love any medium bore, the 9.3s,etc, but I have found nothing my .35 Whelen hasn't done as well. Maybe on elephants/or Aliens? The .358/35 Whelen can use the same bullets, i.e. the Remington 200 PSP/Hornady 200sp,etc make great deer bullets, anything heavier works fine on elk/moose size.
If I had a 700 CDL w/24" bbl, today, I would not go the Improved case "for Improvement". With todays modern bullets, modern powders, there is nothing to gain by going the extra steps in fireforming/dies,etc. However, I "have" to have the Ackley Improved as it is the only earthly thing that continues to make my soul "satisfied", ha. Your 7600 will do just fine, but don't be surprised if you end up as allficted as I am! ( Its a good kind of affliction,to be sure)