barrel length vs bullet type
I don't know for sure, but would guess you'd need faster loads from shorter barrels; and faster opening bullets, since reduced barrel length usually results in reduced velocity.
Is there a general "rule of thumb" about type of SD projectile preferred for 3.5" vs 4.5" barrels? (That is G26 vs G17; G39 vs G38; etc.)
Irresponsible use of alcohol kills many times those killed by guns. And look what happened to PROHIBITION 100 years ago!