I recently purchased a Beretta 70s from an estate sale. The gun has moderate to above-average amount of holster wear but after breaking down the gun it looks like it was hardly fired. Anyway, I took it to the range a couple of weeks ago and it had a pretty stiff trigger but my friend and I were getting pretty tight groups. Here's the problem, after I took it to the range I broke it down, including taking the grips off, cleaned it, oiled it, and reassembled it. Now the trigger has a creaky spring feel to it. I think that either I need to use a thicker lubricant for the gun's internals or the gun needs to be shot some more. What do y'all think? I have a friend who's willing to work the trigger for me but I would like to see if I have other options. TIA