Does doing high and low reps have nothing to do with muscle weight development?

Low reps refers to below 6 reps.
High reps refers to above 12 reps.

When I do push ups, I do more than 40 reps in the first set ( my record is 46 reps), which is high reps ( In other sets the amount of push ups I do get lower of course). I feel that my biceps and chest get pumped. After doing high reps of push ups , I touch my chest, there becomes some hardness but this is only the pump, right? I will not develop any muscle weight, right?

As for low reps, I do dumbell bench press at home. I have a pair of 27.5 kilograms dumbells at home. In the first set I do 4 reps with a pair of 27.5 kilograms dumbells for bench press. In other sets I lower the weight a little bit to do the same amount of reps, though. I did 3 sets of 4 reps the last time for dumbell bench press.

So, Do high and low reps have anything to do with muscle weight development?
Does doing high and low reps have nothing to do with muscle weight development?
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