I play an SM4 60-10 (bent to 59).   This has become my greenside bunker weapon and I also do well on the fairway with it.  I just got it 3 months ago (I was carrying a 58-04 and 62-07 Spin Milled c-c).   It actually stops the ball better vs the 62-07.

It allows me to play a standard open face blast shot in soft sand in a deep bunker.   In a wet bunker I play with a slightly open face and just about square in a hard bunker.    If it is a really hard bunker and I need to get it airborne, I'll play a cut shot back in the stance.

I play most of my bunker shots off the front foot.

I also carry a Spin Milled c-c 54-14 and I can hit it off tight lies because of the narrow sole and it also works in soft sand.

I've also gotten to the point where I can use my 50-08 (bent 1* strong) for a long bunker shot in soft sand.

If I play a tight fairway shot with it, I play back in the stance.

Sounds to me like you hit the ball first, and hit low on the face, and there are some that say that isn't possible.

Here is what I see wrong, out of the sand you play the ball back in your stance and use a wedge with 4* bounce, and by the sound of it you hit the ball first not the sand(which is probably because you only have 4* bounce and if you hit the sand first the ball doesn't go anywhere).

Bounce is a design feature meant to be fit to a style of play, low bounce and playing the ball back in your stance is not a fit.

Bounce is not a reflection of skill.

The SM c-c 58-04 plays more like an old school sand wedge (I used it and a 62-07 before going to the SM4).   The EFFECTIVE bounce is 4* but if you look at the leading edge, it appears to be about 13* or so.  I could actually do a blast shot in wet sand and also out of soft sand.   I played it off the front foot.

I was looking at the sole on the pix of the 60-04 and it looks like it has a high bounce leading edge. 

I play an SM4 60-10.   Most sand shots I play off the front foot and hit 2" behind the ball.  With soft sand I open it up a bit.  Slightly open for wet sand.  Square for firm sand.  When the sand is like concrete or I play off a tight lie and I want a high trajectory, I play a cut shot a little back in the stance.  It works much better than the 60-07 (I couldn't use it in soft sand because it would dig a hole to China). 

FYI - old school sand play was to play the ball back in the stance (the head still remains behind the ball); you still hit the sand first.  There are so many ways they teach one how to hit a bunker shot.   One being lining up left, opening the blade and swinging on the footpath.  Another is to open stance and swing on target line (this move works more in hard bunkers).   Yet another says aim clubface right and feet left with target in middle.

I have the exact same lob wedge (60-04), and have found that playing the ball a little further forward in my stance in the bunker, with an open face, I get high soft flight.  It sounds to me like a simple ball position change may help.

How does the 60-04 work in hard sand, wet sand and soft sand?   I know the old 60-04 SM1 wedges would dig a hole even on turf.  The 58-04 SM3 has a round bottom but the leading edge appears to have 13* of bounce or so.

I've been playing the SM4 60-10 since May.  It has actually taken over for greenside bunker shots in all conditions.  I play slider shots on soft turf and digger shots on tight lies.  I can actually hit it off a dirt clod.  The real acid test is hitting on a severe downhill lie on a mound to a pin below - works like a charm.