British Gun penetration tables

Below are penetration values for British guns, for the plate type "HH" is armour of high hardness, "MQ" is machineable quality armour i.e. rolled homogenous and "FH" is face hardened armour.

Gun	Ammunition	Muzzle Velocity	Angle	Plate	500 Yards	1000 Yards	2000 Yards
Boys AT	Mk II	2950fps	0	HH	17.5	12.4	-
Boys AT	Mk II	2950fps	30	HH	12	10.2	-
2pdr	AP Shell	2600fps	30	MQ	42	36	-
2pdr	AP	2600fps	30	MQ	46	38	22
2pdr	AP HV	2800fps	30	MQ	51	41	24
2pdr	APCBC	2650fps	30	MQ	54	47	35
2pdr	Littlejohn Mk I	4400fps	30	MQ	90	71	-

6pdr Mk II/II	AP	2650fps	30	MQ	73	62	41
			30	FH	64	51	31
6pdr Mk II/III	AP	2800fps	30	MQ	79	66	44
			30	FH	69	55	34
6pdr Mk II/III	APC	2800fps	30	MQ	72	61	40
			30	FH	88	72	45
6pdr Mk II/III	APCBC	2630fps	30	MQ	68	60	44
			30	FH	80	73	57
6pdr Mk IV/V	AP	2900fps	30	MQ	82	71	48
6pdr Mk IV/V	APC	2900fps	30	MQ	78	67	44
			30	FH	93	76	48
6pdr Mk IV/V	APCBC	2780fps	30	MQ	86	80	68
			30	FH	97	82	64
Assumed IV/V	APCR	-	30	MQ	109	90	75
Assumed IV/V	APDS	4000fps	0	MQ	173	153	119
			30	MQ	138	123	95
25pdr	AP	1550fps	30	MQ	63	54	-

17pdr	AP	2900fps	30	MQ	118	110	89
17pdr	APC	2900fps	30	MQ	121	109	84
17pdr	APCBC	2900fps	30	MQ	140	131	111
17pdr	APDS	3950fps	30	MQ	209	192	161
77mm	APCBC	2575fps	30	MQ	120	110	90
77mm	APDS		30	MQ	182	165	130

Sources - See individual weapon for more details