Changing leaders on braid

[briansnat]

Over the past few years I've bought a few bait casting outfits loaded with 40 lb test Power Pro braid and I've been using a (Seagaur) 15 lb test, 6 ft floro leader. I generally change the leader out when it gets down below about 3 feet. That can take a number of trips.

Over the past few weeks I've lost several bass (and lures) when the leader snapped from the braid. I'm using an albright knot to connect them.

Am I not switching out the leaders often enough, or is there a better knot that I should be using, or what?