For the last 3 weeks I've been trying like hard to isolate my chest on my chest workouts. When benching I focus on the bar hitting my nipples and going straight up, fighting the urge to go heavier and move the bar up to utilize my front delts. Same with my incline bench, incline dumbells etc.
My problem is, my chest isn't responding well, and I still feel it in my front delts. I tried switching my shoulder day to the day before chest, to try and murder my front delt so it's less likely to hit when I'm working my chest, but that didn't help too much. Any ideas? I've had multiple people check my form and they say it's fine, last month I taped myself working out and reviewed it, and it looks fine.
I've tried "pinching" the bar when I'm lifting, and flexing my chest out when lifting... still no dice. Thanks!