Short starters are not necessary, but as mentioned, they are liked by some. HINT don't buy an over the counter short starter...they run somewhere from $7.00 on up...when a hardwood Crab Mallet is often $3.00. Use the tip of the handle to start the bullet, and the mallet with a brass drift works for moving front or rear sights when needed...while the common OTC short starter doesn't do well as a mallet.
As for the coconut oil, the problem is it melts at a very low temp...like in your hand. I'd try melting some 100% beeswax and mix it warmed up and melted with warmed up and melted coconut oil, in a ratio of 1 portion of melted wax, to two portions of warmed oil to create a lube.
LD