I dont have any issues running 200g flat point ammo through my Nighthawk 10mm. Most (ok, maybe half) 10mm bullets are flat nose (truncated cone) anyhow. If my tight 1911 chamber will feed them the a glock certainly will if thats what you want.
I'd go with the glock 20SF. If you want a little better comfort carrying get a 4" 1911 with bobtail. Personally I would stick to the 4.5-5" barrels to get the most velocity possible.
I purchased my 10mm for exactly the same reasons. Although I might pick up a 20SF myself for woods carry. The Nighthawk is just too nice to bang around.