The pull will vary depending on the strength of the spring itself. The one in the ASR kit, which I estimate shoots right around 500-550, is not too bad. As far as the exact pull I'm not sure, but someone on AP could probably tell you.
The L96 is a little bit bulky, but you get used to it. The only part on it that feels really bulky to me is the front of the stock, where it is molded in a square shape. As far as being too big, I doubt you would have trouble using one. It really doesn't feel too much longer than most other bolts I have used (except the VSR). It is a little weighty for a spring bolt, but compared to most of the gas replicas I have used, it still feels light.