RE: Why can't I pull more weight?
My first recommendation would be to drop the vegetarian thing .. eat meat .. it creates muscle.
Second ... take the pocket protector out of your shirt, you could get hurt if your string ever got caught.
Third, ever do a push up? A pull up? How about pick something up heavier than your laptop?
Oh heck Bowman2213 .. you made that WAY to easy!!!!
Seriously .. start exercising. You can't lift more weight, or pull back more weight in your case without strengthening your muscles. You could even start shooting more as part of your exercise regime .. the more you shoot .. the easier it will get .. the more you could pull back. It's not rocket science.
You really don't have to pull more than you are .. but it must be tough getting pushed around by all the little old ladies .. sorry, couldn't resist.