Lenght of bullet -VS- Twist is the correct way to put it. The early Greenhill formula used for paper patch bullets and the early cartridge rifles comes close to what you are asking for.
T={Diameter squared X K [Greenhill constant [150] ] / length
But the simple rule of thumb that I use says 1-48 = 1.5 caliber long max
1-38= 1.75 cal.max long 1-28= 2 cal max this rule of thumb is for 45 cal bullets. Hope this helps Lee