Quads, 25g with 1" needle.
Just so you know . . you might want to work out your quad the day you shoot
it or your not gonna be able to move it the next. Stretch and massage it
right after you shoot as well. Showers will help the soreness also. I'd do the
Vastus Lateralis (right quad) if i was you. If you shoot your Rectus Femoris
(middle quad) it's gonna be hard to move your entire quadricep the next day.
With doing the right quad, you'll be less sore across your entire leg.