6-8

honestly depends on the frequency and volume; I've gotten very big and strong very fast doing a single set of 10 5 days a week for 2-3 weeks, Ive gotten very big and strong very fast doing 10 or 8 sets of triples 2-3x a week (never less though oddly, always had to be 3 or more reps), you really can't bring up one without the context of the other.

the important thing in gaining mass aside from the obvious dietary requirements are big compounds (not heavy, just ones that recruit large numbers of motor units), done frequently in a way that allows you to progress on them- add 5lbs, add a rep to each set, add a whole set, just find some way to progress, thats probably the most important part. Isolation work has its place but I think these should take precedence, do the isolation work as needed.

This isn't rocket science bro, upper body is 10-12 reps with at least 4 sets.. increase resistance per set, hints the name progressive resistance training. The legs can take more of a beating so around 14-16 reps per set with at least 6-8 working sets... Remember muscles like the bicep and calves are meant to do continuous reputation, and can be worked every 24 hours. Heavy weights for low reps don't do much for mass, only strenght gains, powerlifters run a set up like 5/3/1 for a increase in strength, hitting your 1RM and doing negative will increase your strength as well, leave more time for other activities.

For me I prefer 6-10 reps for 4 weeks then 12-15 reps for 2 then repeat

For ME, I definitely notice more size as well as strength gains using 8 reps with heavy weight. I had a lot of experience doing 12-15 and I didn't notice as much gains. It may be different for you though. I know the Austrian Oak always says to do higher reps, and I'm not gonna tell him he's wrong!

This was something that I used to worry about a bit but no longer. Why do we count reps? If you stop at 8 for a given weight but can get 1 more out why stop. These days I go by feel. In saying that though I count reps only as a guage for reference later on. When you are doing something like Dorians High Intensity Training the reps don't really come into count. Now I know he says go for say 6-8 but that's full reps then continue on doing partials untill you can't move the weight another inch. So if you add up the total amount of reps you would be somewhere in the vicinity of 15. Now to most that's high reps. But these are done to absolute failure. Not till you can't do a full rep. See you can still stimulate growth by doing partials when you can no longer do full reps. Also rest pause is another good technique that I use as well. Again it's a Dorian Yates thing that is basically derived from Mike Mentzer HIT workouts. So as I said why count reps. Hav a heavy week a moderate week and a light week. This way your body can have a chance to recover from the stress of heavy workouts. But even on the lighter days still go to absolute failure. You give your body no choice but to grow.

although the most common I've seen around is the 5x5 routine, I prefer the 8-10 rep range as well, 3 or 4 sets. if you get 10 reps on your last set you know it's time to up the weight a little bit (:

I am currently doing German volume training but have had success in the 5x5 workouts.

Anyone else feel that going below 8reps even with strict form that the muscle doesnt ever get a good pump?

5-8 for most movements. This approximately corresponds with 70-85% of maximum, a great zone for a good combo of strength/growth at the same time.

I'm doing really heavy 5x5 right now.. Works well

Pyramid sets. I go from lightweight to heavy weight to get both endurance and strength, i got to failure on every single set and eat shit loads of protein/water of course.

i love the classic 10-8-6. played around with alot of different sets and reps and this gets me feeling like someone beat me with a rubber hose every time

How many sets?