SentinelTFCrafterseanbudprojectile .0152
hitscan .033-.08 based on your ping to the server
read the netcode shit in chris's fps configs
do you know if it is possible to specify what weapon should use projectile interp or hit-scan interp?
Well you already necroed the thread so I might as well answer.
You can't change interp between weapons, its been patched ages ago. You can only set 1 interp value per class. So it's not rocket science really, projectile classes (soldier, demo, med for surfs, pyro for reflects) use the projectile interp, the rest use the hitscan one.
In the future, please start a new thread instead of bumping 3 year old ones
considering it's a topic that have been answered multiple times since the update simply googling 'cl_interp settings tf2' would give you ther answer, did it my self and came across kaja's guide which does an excellent job of explaining when to increase interp and what values to use.