One thing You can try, to help get complete tails from those that have long, thin tails...shoot Soft or Super Soft Plastic, and shoot it a little warm. That Runny Melt usually travels quite well. Soft and Super Soft also are more-runny than Regular at a given temp, so those softer mixes can keep their color better than Regular (and Hard).
If You have Regular, I would add 2 ozs Softener to 10 ozs Regular Plastic to make a 12 oz Soft. My Super Soft is 10.5 ozs Soft plus 1.5 ozs Softener for 12 oz total, or 14 ozs Soft to 2 ozs Softener for 16 ozs.