ireload2, there were many times when the Lee Enfield equipped troops went into battle against semi auto rifle equipped troops. They also came out of those conflicts quite well.
Good training and discipline under fire make up the difference. To many people think that the ability to spray a lot of bullets in the general direction of the enemy is the best policy. Not so.
IMHO a man equipped with a bolt action, being well trained in its use and confident in his ability is a far more dangerous adversary than a man equipped with a spray and pray assault rifle. Rifles, like the Lee Enfield, are also purpose designed aussault rifles and in the proper hands every bit as effective.
There are many more arguments in favor of bolt action rifles and I won't go into that here. I will also say that in the proper hands a properly trained man with a semi/full auto rifle is also extremly effective.

In the end it's all in the training.