Nuge,
Your arrows finished (If you are shooting 4" vanes) should weight just about 410grs.
At 225fps and 410grs your KE level was originally = 45-46ft lbs.

If you have upped the draw weight by 10# AND the draw length by a full inch you should be looking at MORE THAN 240fps. Probably more like 250fps +/- which = approx 57-58ft lbs of KE
That' s not bad and its plenty to shoot thru any whitetail you will come across.

That said ,I cannot recommend the Spitfires for your set-up. Sure on a close up perfectly broadside shot they should get the job done, but to get better performance and enough penetration on a consistent basis you need an easier opening, smaller diameter head.
I would recommend you look at the heads with a more modest cutting diameter.......if you like NAP products the " Scorpion" is a much better choice for you. Very sharp, opens quickly and has a cut on contact tip. That would be my choice for your set-up.
Of course there' s always the other proven good penetrators like the Rocket " Steelhead100" or the Rocky Mt. " Snyper" .

I wouldn' t personally shoot the 1.5" diamter " Spitfire" unless I was at or above around 65 ft lbs. of KE (Which I am!)