7mm WSM...Sierra vs Berger

[CEB]

Rifle is a Winchester 70 with 25" Brux #3 with 1:8.5" twist. Rifle has a little over 250 rounds now. All testing/shooting has been RL23 and Sierra 165 GameChanger. Haven't been fully happy with this combo. Seems a little finicky. So did a brief test yesterday with RL26 and 175 SMK. Shows lots of promise. My question is can anyone give me actual experience with that bullet on deer and elk. And same with Berger 175 Elite Hunter. Speeds are around 3000-3050 so far. Sidenote...tested briefly 175 ABLR and wasn't impressed with groups so far. But I have a good amount of them as well. Any info on them is welcome as well. Thanks in advance.