I once read; the rear trigger should have heavier pull.

Typically it will be operated with the stronger part of finger... and will therefore feel the same?

Usually 1/2 pound difference if u r in the 4 or 5 pound region i read.

So that's how i set shotguns up now...

As for trigger pulls on a heavy dangerous game rifle which gets used on dangerous game by very scared untrained newbies... 11 and 13 sounds perfect?

Just my $.2

Regards