Rogers Hornsby has the highest batting average with 40+ home runs in a season, with an average of .401 in 1922.

Interpreted as:

highest batting average by a player with 40+ homeruns in a season

	NAME	AVG	HR	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Rogers Hornsby R. Hornsby	.401	42	1922	SLN	154	623	141	250	46	14	152	65	1	50	17	12	704	450	102	15				.459	.722	1.181	186	97.8	.520	197	92.7
2	Babe Ruth B. Ruth	.393	41	1923	NYY	152	522	151	205	45	13	130	170	4	93	17	21	699	399	99	3				.545	.764	1.309	211	124.7	.571	230	120.4
3	Chuck Klein C. Klein	.386	40	1930	PHN	156	648	158	250	59	8	170	54	4	50	4		719	445	107	13				.436	.687	1.123	181	80	.481	152	58.7
4	Lou Gehrig L. Gehrig	.379	41	1930	NYY	154	581	143	220	42	17	173	101	3	63	12	14	703	419	100	18				.473	.721	1.194	193	94.5	.507	198	98.3
5	Babe Ruth B. Ruth	.378	46	1924	NYY	153	529	143	200	39	7	124	142	4	81	9	13	681	391	92	6				.513	.739	1.252	193	109.2	.549	210	102
6	Babe Ruth B. Ruth	.378	59	1921	NYY	152	540	177	204	44	16	168	145	4	81	17	13	693	457	119	4				.512	.846	1.359	214	127.8	.575	224	118.7
7	Babe Ruth B. Ruth	.376	54	1920	NYY	142	458	158	172	36	9	135	150	3	80	14	14	616	388	99	5				.532	.847	1.379	191	120.9	.597	237	110.5
8	Lou Gehrig L. Gehrig	.373	47	1927	NYY	155	584	149	218	52	18	173	109	3	84	10	8	717	447	117	21				.474	.765	1.240	199	110.9	.540	209	105.6
9	Babe Ruth B. Ruth	.373	46	1931	NYY	145	534	149	199	31	3	162	128	1	51	5	4	663	374	80	0				.495	.700	1.195	181	98.6	.525	206	95.1
10	Todd Helton T. Helton	.372	42	2000	COL	160	580	138	216	59	2	147	103	4	61	5	3	697	405	103	0	10	22	12	.463	.698	1.162	174	82.4	.476	161	58
11	Babe Ruth B. Ruth	.372	47	1926	NYY	152	495	139	184	30	5	153	144	3	76	11	9	652	365	82	10				.516	.737	1.253	184	105.6	.551	216	100.6
12	Barry Bonds B. Bonds	.370	46	2002	SFG	143	403	117	149	31	2	110	198	9	47	9	2	612	322	79	0	2	68	4	.582	.799	1.381	183	110	.544	244	109.9
13	Larry Walker L. Walker	.366	49	1997	COL	153	568	143	208	46	4	130	78	14	90	33	8	664	409	99	0	4	14	15	.452	.720	1.172	168	86.1	.488	177	64.8
14	Jimmie Foxx J. Foxx	.364	58	1932	PHA	154	585	151	213	33	9	169	116	0	96	3	7	701	438	100	0				.469	.749	1.218	193	105.6	.522	198	95.8
15	Lou Gehrig L. Gehrig	.363	49	1934	NYY	154	579	128	210	40	6	166	109	2	31	9	5	690	409	95	0				.465	.706	1.172	182	94.8	.511	194	90.9
16	Barry Bonds B. Bonds	.362	45	2004	SFG	147	373	129	135	27	3	101	232	9	41	6	1	617	303	75	0	3	120	5	.609	.812	1.422	185	108	.537	233	105.7
17	Mike Piazza M. Piazza	.362	40	1997	LAD	152	556	104	201	32	1	124	69	3	77	5	1	633	355	73	0	5	11	19	.431	.638	1.070	141	63.2	.452	183	66.4
18	Norm Cash N. Cash	.361	41	1961	DET	159	535	119	193	22	8	132	124	9	85	11	5	672	354	71	2	2	19	16	.487	.662	1.148	168	88.3	.488	194	79.5
19	Babe Ruth B. Ruth	.359	49	1930	NYY	145	518	150	186	28	9	153	136	1	61	10	10	676	379	86	21				.493	.732	1.225	192	97	.517	204	100.6
20	Albert Pujols A. Pujols	.359	43	2003	STL	157	591	137	212	51	1	124	79	10	65	5	1	685	394	95	0	5	12	13	.439	.667	1.106	160	76.4	.461	184	74.1
21	Jimmie Foxx J. Foxx	.356	48	1933	PHA	149	573	125	204	37	9	163	96	1	93	2	2	670	403	94	0				.449	.703	1.153	170	92.1	.510	189	79.8
22	Hack Wilson H. Wilson	.356	56	1930	CHC	155	585	146	208	35	6	191	105	1	84	3		709	423	97	18				.454	.723	1.177	189	89	.497	171	78.9
23	Babe Ruth B. Ruth	.356	60	1927	NYY	151	540	158	192	29	8	165	137	0	89	7	6	691	417	97	14				.486	.772	1.258	195	109.9	.545	212	104.8
24	Chuck Klein C. Klein	.356	43	1929	PHN	149	616	126	219	45	6	145	54	0	61	5		679	405	94	9				.407	.657	1.065	153	63.4	.463	146	46.2
25	Lou Gehrig L. Gehrig	.354	49	1936	NYY	155	579	167	205	37	7	152	130	7	46	3	4	719	403	93	3				.478	.696	1.174	192	97.6	.512	178	85.8