Some excellent information gleaned from the GTA Airgun Forum and Airgun Warriors. Should come in handy for some (and interesting for all springer enthusiasts).
Apologies if there are any duplications and the information is a little more abbreviated, so no piston weights / transfer port dimensions.
Bore (mm) Stroke (mm) Swept volume (cm3)
Benjamin Super Streak - 30, 120, 82.0
BSA "XL" (Lightning / S'Sport?) - 29, 70, 46
Cometa 300 - 26, 80, 42.5
Cometa 220 - 26, 82, 43.5
Cometa Fenix 400 - 26, 100, 53.1
Crosman Quest - 25, 100, 49
CZ Slavia 634 - 25, 77, 37.8
Diana 25 - 25, 55, 27
Diana 31 and 34 - 28, 80, 49.3
Diana 46 - 28, 85, 52.3
Diana 48 / 52 - 28, 100, 61.6
Diana 54 - 28, 105, 64.4
Diana 350 - 28, 115, 70.8
Diana 460 - 28, 114, 70.2
Gamo 610 - 25 , 85 , 41.7
Gamo Delta Fox - 25 , 61 , 29.9
Gamo Shadow 640 - 25 , 90 , 44.2
Gamo CFX, 440, 890, 220, Whisper, Shadow 1000, Viper, Elite, CF20 and CF30 - 25 , 100 , 49
Gamo 1250 - 29 , 118 , 77.9
Hatsan 70 - 27 , 100 , 57.3
Hatsan 105 - 27 , 100 , 57.3
Hatsan 55S Magnum - 27 , 103 , 59
Hatsan 60S - 27 , 100 , 57.3
Hatsan 80 - 27 , 98 , 56.1
Hatsan 125 - 29 , 120 , 79.5
Hatsan 135 - 30 , 120 , 87
Industry AR1000 - 26 , 107 , 56.8
IZH 22 - 25 , 62 , 30.4
IZH 38C - 25 , 51 , 25
IZH 53M - 25 , 40 , 19.6
IZH 60 - 25 , 57 , 28.0
IZH61 - 25 , 57 , 28.0
IZH MP 512 - 25 , 82 , 40.3
IZH MP513 - 28 , 120 , 73.9
Norica Dragon, Storm, Marvic Gold - 26 , 100 , 53.1
Perfect a 50 - 25 , 75 , 36.8
Remington Genesis 1000 - 29 , 82 , 54.2
Webley Patriot - 30 , 114 , 80.5
Weihrauch HW57 - 26, 81. 3mm x (18mm?) TP - courtesy of Robs 5230
Weihrauch HW98 - (as per HW95) - 26 , 85 , 45
Weihrauch HW90 Gas Ram - 30 , 106 , 75.
Guessing also that the differences in stroke lengths shown for the Hatsan 55, 60 and 80 will be down to measuring inaccuracies and that they share the same strokes?
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