billyboy.. welcome to the forum.
The easy way to answer this question is.. what powder? Some powders like a very firm seating pressure, others not so firm. What I do is basically try and move the bullet down the barrel in a smooth motion and seat it firmly on the powder charge. This does not mean I have to pound the thing down on the powder, and I would not recommend it. But firmly seat the bullet and try the rifle. The main thing is try and be consistent with the pressure you use to seat the bullet.