I wouldn't call Simi Valley remote. It is a fairly conservative area, and I think Gallegly kept getting reelected because of his strong stand on the illegal immigration issue. But you're right, he is pretty moderate.
From the American Conservative Union:
Representative Elton GALLEGLY (R)
California, District 23
2004 Score - 96
Previous Year's Score - 88
Lifetime Score - 89
Years of Service - 18
... which is pretty good, but you mentioned the NRA squishy rating, and he also gets a C+ from the spending hawks at National Taxpayers Union.