Nope.
I think an excess of 12-15 fpe is no longer 'backyard friendly', some may even say much lower.
It's not just about if the backstop can/will stop an intentionally placed shot every time, its about accidental discharges, potential double loads/wonky pellets that may send the projectile way off target, mechanical failures that send a shot down range unintentionally, and just the fact you're transferring such high, potentially fatal energies through the air between you and any distance, which leaves even the slightest opportunity for a fatality or serious injury to occur.
If your projectile can fly 100 yards and still be deadly, you should be shooting at something that has 100+ yards behind it with nothing remotely in your projectiles potential path, like a shooting range, or the like...
-Matt