Standard rifles |
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Model |
Bore D (mm) |
Stroke (mm) |
Swept Vol.(cc) |
TP D x L (mm) |
TP Vol. (cc) |
SCR |
Piston(g) |
Caliber |
Notes |
HW77/97 early |
25 |
81 |
39.76 |
3x6 |
0.042 |
938:1 |
235 |
- |
up to serial number: 1446048 - Some rifles have 2.9, 3 or 3.1mm TP |
HW77/97 Late |
26 |
81 |
43.01 |
3x6 |
0.042 |
1014:1 |
265 |
- |
From serial number 1446049 - Some rifles have 2.9, 3 or 3.1mm TP |
HW95 |
26 |
85 |
45.13 |
3x15 |
0.106 |
426:1 |
254 |
- |
- |
HW80 |
30 |
80 |
56.55 |
2.9x11 |
0.073 |
779:1 |
- |
- |
- |
HW35 Early |
30 |
65 |
45.95 |
4x26 |
0.327 |
141:1 |
- |
- |
Leather seal (up
to serial number 843636) |
HW35 Late |
30 |
65 |
43.83 |
2.8x26 |
0.160 |
274:1 |
- |
- |
Synthetic seal (843637 on) |
TX200 (MK1+2) |
25 |
84 |
41.23 |
3.65x9.8 |
0.103 |
403:1 |
a bit more than 225? |
- |
Additional Top Hat weight.... not sure of weights. Piston will weigh more due to longer piston rod. |
TX200 (MK3) |
25 |
98 |
48.11 |
3.65x9.8 |
0.103 |
470:1 |
225 |
- |
.177 add 27g top hat, .22 add 16g for top hat |
Webley Vulcan |
27 |
79 |
45.23 |
2.5x19 |
0.093 |
485:1 |
- |
- |
- |
Webley Hawke |
25 |
79 |
38.78 |
4x16 |
0.201 |
193:1 |
- |
- |
- |
Westlake B2 |
25.4 |
80 |
40.54 |
4x28 |
0.352 |
116:1 |
- |
- |
- |
HW99S |
26 |
71 |
37.7 |
3x17? |
0.120 |
314:1 |
235 - 225 |
- |
225g piston with seal and no liner. Add 10g if you leave the weight inside the piston. |
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Modified Rifles below |
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HW35LGV |
25 |
71 |
34.85 |
4x6 |
0.075 |
463:1 |
- |
.177 |
Walther LGV Piston - Conversion by Mick (T 20) |
HW77/97 early |
25 |
81 |
39.76 |
3.9x6 |
0.072 |
555:1 |
235 |
- |
TP opened up to 3.9 as suggested by Bigtoe01 |
HW95 |
26 |
85 |
45.13 |
3.6x15 |
0.153 |
296:1 |
254 |
- |
TP opened up to 3.6 as suggested by Bigtoe01 |
HW35 Early mod. |
30 |
62 |
43.83 |
4x26 |
0.327 |
135:1 |
- |
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Synthetic seal convention (Chambers etc) |
model |
Bore |
stroke |
Swept Vol. |
TP dims |
0.042 |
scr |
Piston Weight |
Caliber |
notes |