I would always suggest using chalk.
I currently use a Jacoby with a G 10 tip. Even with scuffing, I find it difficult to get it to chalk up properly.
The other repairman in town builds jump cues. His design is somewhat like the Chilton Flying Eagle only his don't have the double tip. The shaft is slightly more slender than a normal jump shaft and the handle is very slender.
He makes them out of Wenge. I tells ya, These things jump unbelievably well.
Long shots, the cue ball just floats over the object ball. Short hops are amazing.
The ferrule is a one piece phenolic.
With myself, I consider it fortunate if I can keep from bouncing the cue B off the top of the object ball and it staying on the table.
That or just hitting the OB.
Using one of Vic's Sticks, not only can I hit the OB, but many times I can actually pocket the OB.
I think it has to be both the use of Wenge and the design.
Truly amazing and well worth the $175. I try to use rails, kick and masses before I'll bring out the jumper most times.
I would never recommend the Jacoby to anyone. I can jump with my 3 piece break cue 100 times better. The first person that offers me a 50 for it can have it.