I like to use GM's, and occasionally SLDL's as accessory lifts. Both are supposed to be great hamstring exercises, but with me, when the weight goes up, I don't feel them so much in my hamstrings. For example, my best conventional pull is 475, and I feel fairly certain that I could pull 500. When I do SLDL's, with weights like 135, 185, etc., I really feel it in my hamstrings. But when the weight goes up (even to like 275), I feel I am working my back more. Not necessarily a bad thing, but I'd like to be able to activate the hamstrings more as well. I feel like I should be able to get more hamstring activation with a weight around 50% of my max. I know to push the hips back to recruit the hamstrings, so what should I do in terms of weight on these exercises? Go heavy, or lower weight and higher reps? Any tips on activating the hamstrings more? It just feels like I would be wasting my time SLDL'ing and GM'ing 135 when that's not what I'm capable of. I hope that makes sense! Thanks, guys. I appreciate the help.