Not a bad start, but IMHO way too little for IPAs. You'll get much better hoppiness from a WP/flameout and dry hop rate of 2-3# per bbl (each), which translates to 1.0-1.5 oz per gallon. More loss, but that's a tradeoff. I suggest a bittering charge at 60 min or even 30 min for all the IBUs. After flameout, bring the temp down to ~170, do a steep at this temp for 20-30 min with 3#/bbl. Use the same rate for dry hopping.