I've not used 5744, but I looked at the data and nothing about 36 grains seemed out of place. If anything, it would be considered warm, which I wouldn't think would be contributing to your current problem. If your bullets are undersized, cast hard, and bevel based, it's likely that your bullets are not slugging up to fit the bore, and the bevel base is allowing gas to slip around it.
Check your bullet diameter and inquire as to the alloy/brinnel hardness of those bullets. Most commercial cast bullets are too hard with lube way too hard to do any good (it'll stay on during shipping though). Then, they put a bevel base on them so "it makes them easier to load" when it reality, all it does is give gas a path to go where you don't want it.
No, I'm not a fan of MOST commercial cast bullets.
