which team has the highest hr per ab in a calendar month

The Baltimore Orioles have the most home runs per at-bat by a team in a month, with 0.15 in October 1977.

	TEAM	HR/AB	HR	AB	MONTH	G	W%	W	L	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Orioles	0.15	6	39	October 1977	1	1.000	1	0	8	14	2	0	8	3	0	6	1	2	42	34	8	0	0	1	0	.359	.405	.872	1.277
2	Yankees	0.15	15	102	March 2025	3	1.000	3	0	36	34	3	0	35	16	3	21	0	1	124	82	18	0	3	1	1	.333	.427	.804	1.231
3	Red Sox	0.14	3	21	October 2006	1	1.000	1	0	9	7	1	0	9	5	1	4	0	0	27	17	4	0	0	0	1	.333	.481	.810	1.291
4	Indians	0.12	4	33	October 2000	1	1.000	1	0	11	12	2	0	10	1	1	7	0	0	38	26	6	1	2	0	1	.364	.378	.788	1.166
5	Diamondbacks	0.12	4	34	October 2006	1	.000	0	1	6	8	1	0	6	1	0	1	0	0	36	21	5	0	1	0	0	.235	.250	.618	.868
6	Mariners	0.11	4	36	March 1998	1	.000	0	1	9	12	2	0	9	2	1	7	0	0	40	26	6	1	0	0	1	.333	.385	.722	1.107
7	Browns	0.1	3	29	October 1944	1	1.000	1	0	5	6	0	0	5	4	0	6	0	0	34	15	3	1			0	.207	.303	.517	.820
8	Brewers	0.1	4	39	March 2003	1	.000	0	1	9	12	2	0	8	2	0	7	0	0	42	26	6	0	1	0	0	.308	.333	.667	1.000
9	Blue Jays	0.1	11	109	October 2021	3	1.000	3	0	28	38	8	0	28	6	2	13	1	0	117	79	19	0	0	0	1	.349	.393	.725	1.118
10	Rangers	0.1	3	30	October 1978	1	1.000	1	0	9	8	2	0	9	7	0	5	0	0	39	19	5	1	1	0	2	.267	.395	.633	1.028
11	Astros	0.1	4	41	October 1995	1	1.000	1	0	8	16	3	1	7	6	0	6	0	0	48	33	8	0	1	1	2	.390	.458	.805	1.263
12	Cubs	0.1	3	31	October 1916	1	1.000	1	0	6	11	4	0	5	3	0	2	1		35	24	7	1				.355	.412	.774	1.186
13	White Sox	0.1	7	73	March 2018	2	1.000	2	0	18	22	4	0	18	10	1	15	1	0	84	47	11	0	0	0	2	.301	.393	.644	1.037
14	Royals	0.09	3	32	October 2023	1	1.000	1	0	5	11	0	1	5	1	0	8	2	1	35	22	4	1	1	0	0	.344	.353	.688	1.040
15	Cardinals	0.09	3	32	October 2006	1	.000	0	1	3	6	0	0	3	1	0	6	0	0	33	15	3	0	0	0	1	.188	.212	.469	.681
16	Dodgers	0.09	14	153	March 2019	4	.750	3	1	42	50	7	0	41	27	5	29	1	1	191	99	21	4	2	1	2	.327	.439	.647	1.086
17	Angels	0.09	3	33	October 2023	1	1.000	1	0	7	10	2	0	5	6	2	10	1	0	41	21	5	0	0	1	1	.303	.439	.636	1.075
18	Diamondbacks	0.09	3	33	March 2008	1	1.000	1	0	4	5	0	0	4	2	0	9	0	0	35	14	3	0	0	0	0	.152	.200	.424	.624
19	Giants	0.09	3	33	March 2003	1	1.000	1	0	5	9	1	0	4	6	0	5	0	0	40	19	4	1	0	2	3	.273	.385	.576	.960
20	Phillies	0.09	8	89	March 2019	3	1.000	3	0	23	21	3	1	23	20	2	26	1	1	112	50	12	0	1	3	1	.236	.384	.562	.946
21	Red Sox	0.09	6	67	October 2005	2	.500	1	1	14	18	2	0	14	11	0	17	2	0	80	38	8	0	2	0	0	.269	.363	.567	.930
22	Mets	0.09	3	35	March 2014	1	.000	0	1	7	7	0	0	7	3	0	18	0	0	40	16	3	1	1	0	0	.200	.256	.457	.714
23	Reds	0.09	3	35	March 2011	1	1.000	1	0	7	12	1	0	7	4	0	10	0	0	43	22	4	2	2	0	0	.343	.390	.629	1.019
24	Brewers	0.09	3	35	March 2011	1	.000	0	1	6	9	2	0	6	5	0	7	1	0	41	20	5	0	1	2	0	.257	.341	.571	.913
25	Tigers	0.09	13	152	May 2025	4	.750	3	1	34	49	4	0	33	9	4	29	1	0	165	92	17	0	0	0	5	.322	.376	.605	.981