Well let's remember why we bought one to begin with. It's a very concealable and lightweight gun you won't even be aware is in your pocket. Kinda...I’m getting to the point that shooting my S&W Airweight 38 Spl +P at the range has become too painful in my later years. I took my Ruger SP101 to my shooting location today and it reminded me how nice it is to do range work with a heavier revolver.
A S&W Airweight is never a range gun I suppose at least for me…unless I want to use target velocity 148 gr wadcutters…maybe it’s time for a trade in…maybe an all steel classic S&W Model 36 38 Spl +P rated…maybe not. My first snub was a Model 36 purchased in the late 70’s…another one which got away in time. Even had a 32 S&W Long Model 31 snub…fun shooting the shorter 32 S&W out of it also.
The SP101 is also the right size for my big mitts…but the double action smoothness pales in comparison with a Smith…oh well, I learned long ago that life is full of compromises.
I would suggest not changing the main spring. I did that and started getting light strikes in my 442. I did, however, change the rebound spring to a 13# (I believe stock i 18#) and it helped. Went from about 12+ pounds to 9.5-10#. Big difference.Stock S&W Airweights are not pleasurable to shoot at the range. In their default configuration, the gun is very snappy and the trigger pull is excessively heavy. However, none of those things matter in a close quarters gunfight. You will be able to dump an entire cylinder of .38 Special +P into the violent attacker no problem.
To make the S&W Airweights fun, you need to get better grips that will reduce that recoil. VZ makes "High Horn" grips that are 10x better than the stock grips. It makes shooting several boxes of .38 Special actually enjoyable. Next, get a Wolf Spring kit for $20 and the trigger experience will be significantly improved.