My measurements using very generic metric gauge:

Fwd strap to fwd cylinder (area with scuff marks)
0.21-0.26mm (0.008-0.010”)

Aft strap to cylinder
0.17 -0.21mm (0.007-0.008”)

Barrel/cyl gap, static, after a DA dry fire (cyl at rest)
0.10-0.15mm (0.004-0.006”)

Barrel gap pushed fwd:
0.004-0.006”

Barrel gap pushed aft:
0.008-0.010”

0.004” movement