They endorsed Murtha. His report card rating was the same as his opponents.
Yes, many times the NRA endorses liberal Dems who are likely to sell out gunowners when a real close vote comes up. That is the trouble with being a single issue conservative organization.
But...the NRA is the big boy in the 2nd Amendment field and they have fought some good fights for us. As for them just being a money raising organization using shrill voiced alarmist rhetoric that charge could much better be applied to GreenPeace and the Sierra Club.