So I know with punches there should be a weight transfer from one foor to the other , but with the cross it feels much easier to have the weight already on the front foot, and really difficult and slow to rotate the hips if the weight starts on the back foot. Also the jab puts the weight on the front foot and then you cross with he weight already on the front foot if you combo the 2. So at the moment I have about 70% of my weight on the front foot and 30% on the back foot and thats what feels easiest fastest and most natural for throwing the cross, but does that mean im only transferring 30% of my body mass when I could be transferring nearly 100% of it?
Just practice. No great puncher ever learned by analyzing percentages of weight distribution. With enough practice, you will learn what a proper one feels like. Overthinking can hinder your performance.
Ha, ha ha, virus my thoughts exactly, I hope the OP like being knocked down because that is what is going to happen to him if he goes around fighting people off the front foot. My bet is the OP is a plodder. Nothing wrong with that, but if you work a little foot movement into your game and get proper balance, you will find it easier to shift weight. Your balance is likely outta wak because your footplacement is wrong. So it feels natural to do something wrong. You throw a jab than a cross, your opponent slips/sliders your cross and it doesn't take much of a hit to knock you over. Weight transfer should be moving between foots.
I like to think of the rear foot as a catapult, and the weight your leaning in is the size of the boulder you put in it. If you constantly leaning over to extend your right and lunge, you're subtracting from the weight that gets thrusted forward into the punch when you pivot. If you sit back, like, say, James Toney, and pivot while punching through the target, you get a lot of leverage and authority behind it. Even if you're more upright or advancing on the front foot, a majority of your weight being on your back foot is generally a good idea and provides good balance, along with the follow through on rear-hand punches. That's my understanding of it, anyway.
What generates power is what you are stood on, the Ground. It Helps to be in Balance to Transport the Head to where it wants to be.