My crossbow shoots at around 300 fps
A typical “medium performance” bit of kit.
During the year the bolts drop over range is:
Range Summer Winter (Drop in inches “)
15 yards -2 inches -4 inches
20 yards -4 inches -6 inches
25 yards -8 inches -11 inches
30 yards -12 inches -13 inches (Maximum range I use it over)
Thus in winter a 10 Celsius drop increased the average drop by 2½”.
Only unlike a firearm, the drop DECREASED after a number of shots.
Why was that, any guesses?
Ultimately it was traced down to using a fibre glass prod (bow) and the loss of flexibility due to the cold which improved with flexion.
Proven quite simply by heating up the prod with a hairdryer on a second string of shots.
Something to think about as I sit waiting for the Canada Geese to swim by.
They better hurry though, it’s going to drop to minus 5 C later.
That’s 12 degrees and I’ve no data for that.
Bear in mind a goose’s sweet spot on the head is only a ½” across.