Stroke lengths, TP sizes and SCR for various springers...

[brucegill]

OK guys, with all this talk of SCR etc... How about we put a list together of the standard stroke lengths, bore sizes and TP sizes?

I've got ones for a HW 77/97 and a 95 (HW80 + HW35 added) so far.... Would be interested to know them for the 99, 80, 55, TX/Prosport old and new, LGV etc....

I'll need: Model - Bore size (B) - Stroke Length (S) - Transfer Port Diameter x Length (TP) - Piston weight in grams without the liner but with the seal.

Standard rifles
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.
Modified Rifles below
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	-	-	Synthetic seal convention (Chambers etc)
model	Bore	stroke	Swept Vol.	TP dims	0.042	scr	Piston Weight	Caliber	notes