For sheer nicotine power the strongest snuff I’ve had is the homemade snuff I made from Cotton Boll Twist. It has a nice flavour too, but the drip is really bad–like battery acid slowly dripping down your throat. As a chew it’s an acquired taste, being unflavoured. One youtube reviewer compared a similar twist to chewing a dried-up camel’s anus. As others have noted, very fine snuffs will give you quick nicotine, e.g. Dholakia white, Bruton and Fubar Grunt. Coarser snuffs have more nicotine but release it more gradually–it sneaks up on you and can actually make you feel sick if you’re not careful, e.g. NTSU black, Taxi red, Viking dark.
both Snafu and Sparrow are true killers…God how I love them !!!
I will put in a vote for Viking Dark. Its strong on its own; but add the moisture level and grind- you can pack a ton up there, and let the wave take you.
Toque Quit has a nice punch and will not hurt you unless you go nuts…D. White…will hurt you but I enjoy it… I have Fubar Doolali Tap and it’s underrated as FECK especially when you’re drunk…it’ll clear you out so you can keep snuffing plus you get a feel good feeling from the heat…
D. White doesn’t hurt with big pinches. 
@SnuffySnuff yer trying to trick me into a snufftastic suicide sniff, ya rascal! That stuff is potent!
No mate, I’m being honest. I know it’s totally counterintuitive but big pinches, using middle finger rather than forefinger - with ANY snuff - makes them much easier to take. Be brave. Try it