well sorry if this offends you, but NO deer hit with a broad head and the shaft breaks off si FINE
and odds are it could very well be DEAD!
due dillagence means looking for that deer with effort
just cause NO blood or?? you KNOW Its been hit, most modern crossbows have enough energy to push a broadsheet thru a shoulder blade, MAYBE NOT BOTH< but enough to get a head into vitals, and a bolt stock in a deer will, NOT bleed all the time at first, as its plugging the hole so to speak
BUT as that deer moves that shaft with the broadhead on will move and cut things as it moves and could KILL it, be it a 100 yards away or a 1/2 mile or???
you really should be looking for that deer IMO!

you say you practice , but then say you DON"T practice at 40 yards yet took a shot at 40 yards,
that's not the way to find out if you can HIT things, as a living animal
the time to KNOW if you can make a 40 yards shot is in PRACTICE at a TARGET
or you can again, be shooting another deer, y you might be wounding, and or NOT recovering, yet ends up dying due to your poor shot placement!

IF you want MY opinion,
I say you need to practice MORE< get better at HITTING things your aiming at, at distances you can hit them at accurately!
and learn more about what to do after you SHOOT a deer, in ways to attempt to find it afterwards!

BY law, your required to make all efforts to find a animal you SHOOT too!
not just shoot them, and say, there OK, and shoot another one!