Loaded question. A hand gun is a Personal defense weapon not a war fighter . While I am truly a fan of the .45 If I was to have only 1 for personal defense it would not likely be a .45.
Because you have 800 to spend does not mean you have to spend it all.
Smaller lighter people soften have problems working the slide on a Auto you need to visit a gun shop and let GF try it. If she has problems you may want to look at a revolver.
Class of hand guns in auto
Full size often easiest to shoot and more accurate a bit harder to carry generally more rounds
Compact they take a bit more practice to shoot well smaller easier to carry many have about same rounds as a full size
Subcompact Small weapons harder to shoot due to size and shorter barrel but most get use to them easy to carry less rounds.
Fair priced does not always mean cheap in weapons.
Ruger line
SR's are full size and fine weapons in any caliber The SR9C,SR40C ect are compact weapons also very good the LC9 and LCP are small but good weapons
The Ruger P series are full size and some are about the best buy in 9mm and 40 on the market today. Larger and some what bulky
Take a look at the Springfield line
S&W.
What caliber gets a war started for a personal defense you need to figure out what you want. IMO in revolver .38 or 357 357 is nice because it shoots .38 also but is a bit heavier.
Autos 9mm,40mm or .45 all do the job rounds are more common
100 pound GF is going to find issues with many Auto my wife after years of shooting had to go back to a revolver, her hand could no longer grip the an auto to pull the slide back.
Regardless of caliber general rule the larger and heavier a weapon the more manageable recoil, the smaller and lighter the more recoil .
Some examples . Top brown is a full size .45 14 round double stack shoot nice weights a ton loaded you better have a good grip to chamber a round
below that right Ruger P89 full size 9mm light easy to handle stiff but manageable to chamber a round. 3rd left Ruger SR9C 10 or 17 rounds depending on the mag you use . A very manageable compact strong pull on silde is needed to chamber.
3rd right Ruger LC9 lighter weight 9mm to hard to chamber but does require a good grip 7 round mag a good up close defense weapon
Last LCP 380 very small and light easy to chamber limited in stopping power but not unreasonable for an up close Carry conceal I would not use it for a BOB
You have some home work to do take your time find what fits your needs. Forget the cool sounding names and internet hype on one weapon or another. Don't pay just for a name.
.
Because you have 800 to spend does not mean you have to spend it all.
Smaller lighter people soften have problems working the slide on a Auto you need to visit a gun shop and let GF try it. If she has problems you may want to look at a revolver.
Class of hand guns in auto
Full size often easiest to shoot and more accurate a bit harder to carry generally more rounds
Compact they take a bit more practice to shoot well smaller easier to carry many have about same rounds as a full size
Subcompact Small weapons harder to shoot due to size and shorter barrel but most get use to them easy to carry less rounds.
Fair priced does not always mean cheap in weapons.
Ruger line
SR's are full size and fine weapons in any caliber The SR9C,SR40C ect are compact weapons also very good the LC9 and LCP are small but good weapons
The Ruger P series are full size and some are about the best buy in 9mm and 40 on the market today. Larger and some what bulky
Take a look at the Springfield line
S&W.
What caliber gets a war started for a personal defense you need to figure out what you want. IMO in revolver .38 or 357 357 is nice because it shoots .38 also but is a bit heavier.
Autos 9mm,40mm or .45 all do the job rounds are more common
100 pound GF is going to find issues with many Auto my wife after years of shooting had to go back to a revolver, her hand could no longer grip the an auto to pull the slide back.
Regardless of caliber general rule the larger and heavier a weapon the more manageable recoil, the smaller and lighter the more recoil .
Some examples . Top brown is a full size .45 14 round double stack shoot nice weights a ton loaded you better have a good grip to chamber a round
below that right Ruger P89 full size 9mm light easy to handle stiff but manageable to chamber a round. 3rd left Ruger SR9C 10 or 17 rounds depending on the mag you use . A very manageable compact strong pull on silde is needed to chamber.
3rd right Ruger LC9 lighter weight 9mm to hard to chamber but does require a good grip 7 round mag a good up close defense weapon
Last LCP 380 very small and light easy to chamber limited in stopping power but not unreasonable for an up close Carry conceal I would not use it for a BOB
You have some home work to do take your time find what fits your needs. Forget the cool sounding names and internet hype on one weapon or another. Don't pay just for a name.
.
