Just keep pinching using all different grinds and dry/moist snuffs - and the pinch can be perfected within a week.
What I mostly use is a combo of pinching and plugging - Dont know if I will be effective in describing it.
I take a pinch of snuff and press it a little to make it stick on forefinger and thumb, then place forefinger beneath one nostril and thumb beneath another at the same time and while alternating taking my finger on and off from the rim of the base of the nose, breathing in gently, the snuff is in the nose in no time.