anyone tried the lothar walther barrel on a crosman co2 pistol?

[eyebull]

if you look at the original ssg by Bob Sterne you'll see that the adjustment is needed to a degree and that they weren't designed for co2 more the big bore pcp's and was a means of getting the efficiency up
on the original the preload was adjusted from the rear as was the distance between the hammer and spring guide
personally think fitting a 2300 valve reducer and a short hammer spring and a power adjuster gets better results on co2

I've covered all of this.

You have to adjust it when setting it up, but that's no different to fitting a new hammer spring set-up.
They may have been originally designed for PCP, but a challenge was then issued on that forum to apply it to the 2240, which many did successfully.
Fitting a 2300 valve reducer and new hammer spring and fitting a power adjuster sounds like rather more hassle, and more money, than making an SSG, which took me less than 20 minutes to make and fit including the time taken to disassemble and re-assemble a 2240.

I'm getting 120 3.5FPE shots out of a 12g caplet [edit: in .177 too], and struggling to see where the big problem is with this.

By all means give it a try.