About

Opening its doors in 2017, Viper bullets began as a side project for owner Peter Sutton who designed mono-metal bullets in his downtime between manufacturing precision mining and firearm parts in his machine shop. Located in the West Rand, the small engineering company has since taken on larger premises and produces bullets day and night.

All our bullets are manufactured to the highest standards from brass and copper bar stock on CNC lathes, with each piece individually tested for tolerance, weight and hand polished before shipping. Our designs are carefully tested in the range and veld, and since its inception our lines of bullets have successfully been used by enthusiastic shooters and Professional Hunters alike on a multitude of antelope, varmint species and even the big 5 across three continents.

BC & Twist: Plains Supreme

Calibre	Weight (gr)	BC G1	BC G7	Twist Rate	Stab Fac. @ Sea Level	Stab Fac. @ 1520m
.224
Flat Base	30	0.122		1 in 14	1.53	1.84
Flat Base	45	0.144		1 in 13 @ sea 1 in 14 @ 1520m	1.63	1.4
Flat Base	47	0.169		1 in 12	1.49	1.79
	50	0.221		1 in 10	1.69	2.03
Flat Base	50	0.187		1 in 12	1.35	1.62
Flat Base	55	0.2		1 in 12	1.31	1.57
	60	0.286	0.141	1 in 9	1.56	1.87
	65	0.299		1 in 9	1.39	1.67
	70	0.33	0.164	1 in 8	1.6	1.93
	80	0.338	0.193	1 in 7	1.81	2.18
.243
	70	0.32	0.155	1 in 10	1.59	1.91
	75	0.348	0.169	1 in 10	1.39	1.69
	80	0.337	0.163	1 in 10	1.4	1.68
	85	0.372	0.18	1 in 10	1.22	1.5
T7	85	0.317			1.5	1.79
Flat Base	90	0.328		1 in 9	1.46	1.75
	95	0.416		1 in 8	1.61	1.53
	100	0.43	0.208	1 in 8	1.5	1.8
.257(6.35mm)
T7	87	0.331		1 in 10	1.96	2.36
T7	100	0.375		1 in 10	1.54	1.85
.264(6.5mm)
	85	0.307		1 in 9	2.87	3.29
	100	0.364		1 in 9	1.95	2.34
	115	0.41		1 in 9	1.7	2.04
	120	0.431		1 in 8	1.97	2.36
	125	0.467		1 in 8	1.75	2.1
	130	0.484	0.269	1 in 8	1.63	1.95
.270(.277″)
	120	0.432		1 in 10	1.55	1.86
	130	0.459		1 in 10	1.39	1.68
	140	0.46			1.29	1.55
T7	145	0.451		1 in 10	1.32	1.59
7mm(.284″)
	130	0.331		1 in 9	2.58	3.1
	140	0.35		1 in 9	2.25	2.7
	154	0.466		1 in 9	1.61	1.93
	162	0.51		1 in 9	1.48	1.78
Flat Base	170	0.466		1 in 9	1.55	1.86
.308
	130	0.34		1 in 13	1.56	1.88
	140	0.362		1 in 12	1.48	1.78
	150	0.4		1 in 12	1.5	1.78
T10	165	0.425		1 in 12	1.22	1.5
T7	165	0.407		1 in 12	1.5	1.81
	180	0.441		1 in 10	1.67	2.01
Flat Base	200	0.478		1 in 10	1.59	1.91
Flat Base	220	0.526		1 in 10	1.31	1.58
.303
	130	0.309		1 in 10	2.64	3.17
	150	0.382		1 in 10	2.36	2.83
	180	0.45		1 in 10	1.84	2.21
8mm
	160	0.357		1 in 10	2.57	3.09
	175	0.47		1 in 10	2.22	2.67
	200	0.541	0.278	1 in 9.5	1.82	2.15
	220	0.536	0.302	1 in 10	1.85	2.22
.330
Flat Base	250	0.55		1 in 10	1.72	2.06
.338
	180	0.43		1 in 10	2.95	3.54
	200	0.49		1 in 10	2.63	3.16
	225	0.469			2.23	2.67
	250	0.63		1 in 10	1.7	2.05
T10	250	0.6		1 in 10	1.81	2.17
	275	0.59		1 in 10	1.82	2.19
	300	0.553			1.63	1.95
9.3mm
	250	0.477	0.271	1 in 14	1.64	1.97
Flat Base	286	0.474	0.309	1 in 15	1.66	2
.375
	235	0.45	0.236	1 in 12	2.68	3.23
	250	0.486	0.243	1 in 12	2.54	3.05
	270	0.49	0.251	1 in 12	2.35	2.83
Flat Base	300	0.506		1 in 12	2.24	2.69
.404
	300	0.341	0.241		2.97	3.57
	350	0.397	0.281		2.46	2.95
	400	0.45	0.321		2.23	2.68
.416
	300	0.352	0.25
	350	0.4	0.293
	400	0.46	0.335
.458
	350
	400
	450
	500
.50 BMG
	650	0.756	0.358	1 in 19
	750	0.88	0.416	1 in 16

BC & Twist: Bush Supreme

Calibre	Weight (gr)	BC G1	BC G7	Twist Rate	Stab Fac. @ Sea Level	Stab Fac. @ 1520m
.224
	40	0.12		1 in 14	1.53	1.84
	45	0.14		1 in 14	1.35	1.64
	50	0.144		1 in 12	1.71	2.05
	55	0.154		1 in 11	1.61	1.94
	60	0.163		1 in 10	1.69	2.04
.257(6.35mm)
	115	0.21		1 in 10	1.52	1.8
.264(6.5mm)
	140	0.28		1 in 9	1.54	1.85
.270(.277″)
	150
7mm(.284″)
	154	0.177		1 in 9	2.78	3.34
.308
	150	0.22	0.23	1 in 14	1.57	1.89
	165	0.253		1 in 13	1.54	1.86
	180	0.27	0.279	1 in 12	1.58	1.9
	215
.303
	165	0.244		1 in 10	3.05	3.68
	180	0.271		1 in 10
	215
8mm
	200	0.36	0.273	1 in 10	2.37	2.85
.338
	250	0.26	0.318	1 in 10	2.79	3.36
9mm
	250	0.314		1 in 10	3.45	4.15
9.3mm
	250	0.22	0.272		2.44	2.93
	286	0.249	0.309	1 in 14	1.59	1.91
0.375
	250	0.224	0.253	1 in 14	2.79	3.16
	300	0.268	0.305	1 in 12	3.23	3.88
.416
	350	0.212	0.290	1 in 16	4.12	4.95
	400	0.24	0.33	1 in 16	2.36	2.84
.404
	350	0.21			3.99	4.8
	400	0.215	0.323	1 in 16	2.54	3.06
.458
	350	0.18	0.243	1 in 16
	400	0.206	0.279	1 in 16
	450	0.215	0.315	1 in 16
	500	0.253	0.343	1 in 16

BC & Twist: Percussion Cup

Calibre	Weight (gr)	BC G1	BC G7	Twist Rate	Stab Fac. @ Sea Level	Stab Fac. @ 1520m
.338
	250	0.178	0.316	1 in 10	3.23	3.88
9.3mm
	286	0.225	0.313	1 in 14	2.19	2.63
.375
	300	0.19	0.313	1 in 15	3.37	4.05
	320	0.199	0.328
.416
	350	0.179	0.292	1 in 16	3.34	4.02
	400	0.203	0.332	1 in 16	2.7	3.07
.404
	350	0.175			4.07	4.89
	400			1 in 16	2.87	3.33
.425
	400	0.216	0.322	1 in 18
.458
	310	0.142	0.215	1 in 35
	350			1 in 24
	400	0.181	0.276	1 in 24
	425	0.202	0.312	1 in 16
	450	0.207	0.312	1 in 16
	470	0.212	0.325	1 in 16
Brass	470	0.222	0.345	1 in 16
	500	0.226	0.345	1 in 16
	550	0.249	0.382	1 in 16
.470
	500	0.249	0.324	1 in 20
	550
.505
	535	0.207	0.299	1 in 26
	570	0.222	0.321	1 in 22
.510
	535	0.207	0.296	1 in 26
	570	0.221	0.315	1 in 24
0.600 (0.62″)
	900	0.278	0.338	1 in 34

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