IPA's tend to be higher gravity than 1.050 according to the 2008 BJCP guidelines.
However, that should stop you from making a tasty, hoppy pale ale!
I'm sure you can find some good pale ale recipes in the 'receipes' section, and just sub in those hops. (Great hops to have on hand BTW)
Something along the lines of:
#9 Pale, 2-row malt
#1 Carmel 40L
0.5 oz Centennial hops (60 min)
0.5 oz Amarillo hops (20 min)
0.5 oz Centennial hops (10 min)
0.5 oz Amarillo hops (10 min)
0.5 oz Centennial hops (2 min)
0.5 oz Amarillo hops (2 min)
US-05 Ale Yeast
If you want, you could dry hop with an oz. of each for 2 weeks, and get some great hop aroma on that...
p.s. I've not tried BIAB myself, but could you double bag those large grain bills? Or try a stronger mesh bag?