trimming and fitting hind feet

I think what you're seeing is a typical quarter horse hind foot

Donnie do you have a pic of the shod foot?

on hind feet my quarters are always parallel but the inside branch is at least 3/8" shorter

Michael I have a horse later in the week to shoe , he is not a jumper
but a driving cob.
I know this lads feet will be all over the shop (once or twice a year)
it might give you an idea what I try to do with a hind foot
will make the set on site

Smitty - I don't have a picture of the previous post after shoeing but here is another quite similar. Most QH's have hind feet shaped like this - "reset"

Any reason for the different nailing michael?

Not really.

i use the lightest shoe i can on a jumper. i like century support , which offers full heels too. on that pic from D. Walker i would leave the outside heel a bit wide, to give more support caudally, after all, the back end pushes the horse over the jump, and thats a lot of stress/strain. . getting feed back from the rider is good too.
are you only using four nails in that foot? and right close together.