I started shooting the 35 Whelen last year and I now shoot a 35 WhelenAI with CM Kreiger 24" barrel with 1/14 twist. It's on a 700 action, Williams bottom metal and 70 style saftey all matte finish in a Remington wood BDL stock.
I've only shot the 225gr AB 1.370" long,225gr TSX 1.315" long and the 250gr Hornady SP 1.250" long. I did buy some 225gr Sierra 1.150" long and 220gr Speer 1.100" long.
I got out for acouple days last year hunting elk seen only one bull he was with some cows couldn't get a clear shot so maybe this year. I settled on 225gr AB. Well good luck