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Medium Calibres from .300"/7.62mm   to   .333"/8.46mm

See the Technical Data page for assistance with the correct choice of bullet and for BC values.

Read the following notes before going to the load data table below.

Cartridge: If your cartridge is not listed, please email us for assistance.

Bullet: Bullet numbers consist of the caliber (first three digits) the weight in gr (next three digits) the bullet type (two letters) and the part number (three digits ). Bullets in green are the preferred bullets for general use in standard calibers.

Twist: The twist is indicated as one rotation in the number of inches shown. This is a minimum number. When a bullet is indicated for a twist rate, it can also be used in faster twist rates (smaller numbers), but not in slower twist rates (bigger numbers).  See the Technical Data page for more information about the correct bullet choice.

Powder: Listed powders are chosen to give a combination of the best case fill, most complete burn in a 24"barrel and lowest muzzle pressure. If a powder is not listed, the powder on the list gives better performance or the unlisted powder is new and has not been tested.

Start gr: The indicated start load in grains is a safe load in our experience. It may give maximum speed in some rifles and can be reduced if needed. It is not a minimum load and it is not supposed to give the speed as shown in the MAX FPS column.

MAX FPS: This is the speed at which maximum allowed pressure is likely to occur in a 24" barrel. Adjust the number by the amount given in the FPS/Inch column for barrels longer or shorter than 24". Do not exceed the adjusted MAX FPS number. Whatever charge is required to reach the MAX FPS (P/Max ) is the maximum charge for that rifle.

FPS/Inch: This is the speed change that is probable for barrels longer or shorter than 24" with the indicated powder. Add or subtract the value in this column for every inch the barrel is longer or shorter than 24".  All load data is configured for 24" barrels except where it is stated otherwise.

Case Fill: Is approximately how much the charge will fill the case. Compressed charges up to 105% are not unusual. Full cases give better accuracy and more consistent speeds. This is a guide line only and the numbers may vary depending on the make of the case and the capacity. If this column contains CC, case capacity will probably be the limiting factor rather than MAX FPS.

Burn: Is the percentage of powder that will burn in a 24" barrel. Accuracy is improved with a more complete burn.

M/PSI: Is the approximate muzzle pressure at MAX FPS. This is an indication of what the recoil will be. With the same bullet and rifle, lower muzzle pressure will have less recoil.

Load Data for Medium Calibres from .300"/7.62mm  to   .333"/8.46mm
Go to Small Calibres / Large Calibres

Have you read the notes above?  If not, do so before using this load data table.

Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
30-06 Ackley Improved	308130HV080	13	ADI AR2219	51	3250	28
			IMR 3031	52	3300	29
			BL-C2	58	3300	31
			IMR 4895	55	3300	30
			Norma 203B	56	3300	31
			S321	55	3250	30
			Viht N530	52	3250	30
			Win 748	55	3300	30
30-06 Ackley Improved	308140HV241	11	ADI AR 2208	53	3125	29
			IMR 3031	50	3175	27
			IMR 4895	52	3175	27
			Norma 203B	54	3175	30
			Viht N530	50	3125	28
			S321	53	3150	29
			Win 748	53	3175	29
30-06 Ackley Improved	308150HV079	10	ADI AR2208	52	3050	27
			IMR 4895	52	3100	27
			Ramshot TAC	57	3100	28
			S355	54	3075	28
			Norma 203B	53	3075	28
			Viht N530	50	3050	26
			Win 748	52	3075	27
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		%Fill	Burn	M/PSI
300 WSM	308130HV080	13	ADI AR 2206H	61	3450	31		96	100	10647
			Morma 203B	64	3475	32		100	100	10832
			Rel 17	68	3500	33		101	100	11224
			R/Shot BigGame	68	3500	32		102	100	11013
			S355	64	3450	32		103	100	10571
			Viht N550	69	3500	33		106	100	11492
300 WSM	308140HV241	11	ADI AR 2206H	59	3325	30		96	100	10365
			R/Shot BigGame	65	3375	30		101	100	10731
			Rel 17	65	3400	31		100	100	10943
			S355	62	3325	30		103	100	10293
			Norma 203B	61	3350	30		99	100	10543
			Viht N550	67	3400	32		105	100	11237
300 WSM	308150HV079	10	ADI AR 2208	60	3275	29		100	100	10716
			Norma 203B	62	3325	30		98	100	11077
			Rel 17	64	3375	30		99	100	11527
			R/Shot BigGame	64	3350	30		100	100	11303
			S355	62	3300	29		102	100	10821
			Viht N550	66	3350	31		104	100	11865
300 WSM	308160HV078	10	ADI AR 2208	59	3175	27		99	100	10501
			R/Shot BigGame	61	3225	29		99	100	11066
			Rel 17	63	3275	29		98	100	11288
			Norma URP	64	3250	29		106	100	11488
			S365	66	3275	29		CC	100	11179
			Viht N550	64	3250	30		103	100	11638
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
30 Newton	308160HV078	10	ADI AR 2209	68	3000	32		98	97	11660
			A 4350	64	2975	31		98	100	11216
			H4350	65	3000	31		94	100	11408
			Norma URP	64	2975	31		94	100	11136
			S365	67	3000	30		96	100	10872
			Viht N550	65	2975	32		91	100	11236
			S365	70	3200	30		102	100	11670
			Viht N550	68	3200	32		97	100	12141
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
303 British	311140HV083	10	ADI AR 2219	40	2900	24		93	100	7188
			A 2495	43	2925	25		109	100	7494
			IMR 3031	42	2950	25		108	100	7510
			Norma 202	42	2900	25		104	100	7406
			S335	42	2850	24		103	100	6804
			S321	44	2925	26		99	98	7656
			Viht N140	43	2875	25		108	100	7111
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
303 Epps	311140HV083	10	ADI AR 2219	44	3050	26		90	100	8148
			A 2495	47	3100	27		105	100	8502
			IMR 4895	48	3100	27		103	99	8452
			Norma 202	47	3050	25		100	100	8420
			S321	50	3050	27		96	99	8750
			Viht N135	48	3050	25		109	100	7943
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
8x57JS	323160HV102	12	ADI AR2210	45	2900	24
			Accurate 2495	49	3000	24		CC
			IMR3031	47	3000	24		CC
			S335	49	2950	23
			Norma 202	48	2950	24
			Viht N530	47	2950	25
8x57JS	323180HV073	10	S335	45	2675	21		99	100	6889
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
325 WSM	323170HV188	12	ADI AR 2208	61	3150	27
			H380	64	3200	26
			Rel 15	61	3200	27
			IMR 4895	60	3200	27
			Norma 203B	62	3200	27
			S355	63	3175	27
			Viht N550	67	3250	29
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
8mm Rem Mag	323170HV188	12	H4350	78	3300	33
			Ramshot Hunter	81	3300	33
			Rel 19	82	3300	34
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI
318 Westley Richards	330165HV109		S335	50	2800	25
Cartridge	Bullet	Twist	Powder	Start gr	MAX FPS	FPS/Inch		% Fill	Burn	M/PSI

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GS Custom Bullets, situated in Port Elizabeth on the East Coast of South Africa, manufactures solid copper, turned, monolithic hollow point bullets for hunting and sport shooting. These bullets are used by hunters on several continents, hunting from the smallest of antelope to the largest of dangerous game, using the smooth HP bullet, as well as the more popular HV, FN and SP bullets with the patented drive band concept. GSC bullets are configured for the highest possible ballistic coefficients. SP bullets are mainly used for sport shooting. All GS Custom Bullets are coated.