Load data for 7.7 X 58 mm Arisaka + .300 | 220gr | Berry's Spire Point

Recommended Powder(s): Alliant Reloder-17, Hodgdon Hybrid 100V, Rottweil R 903, SNPE Vectan SP 11, Somchem S365

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.300 \| 220gr \| Berry's Spire Point
Manufacturer SKU:	.300 Blackout 220gr (.308) Spire Point
Bullet Weight:	220gr \| 14.3g
Bullet Diameter:	0.308" \| 7.82mm
Bullet Length:	<<locked>>
Caliber:	7.7 X 58 mm Arisaka load data
Case Length (l3):	2.270" \| 57.7mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
Case Capacity:	61.0 Grains of Water \| 3.96 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B12038_C1134
Last updated:	2026-03-22

Load data for 106 loads in caliber 7.7 X 58 mm Arisaka with .300 | 220gr | Berry's Spire Point bullet and 53 powders such as Alliant Reloder-17, Hodgdon Hybrid 100V, Rottweil R 903, SNPE Vectan SP 11, Somchem S365. The key underlying parameters are shown in the table above.

Important Notice: DO NOT go below Minimum Charge or above Maximum Charge unless there are reasons. Since xxlreloading.com has no control over the equipment and components used by the customer and the data used in connection with the website, any responsibility and liability for the results achieved is rejected. Also see our Terms of Service.

Questions regarding the load data: Please read the information in the next tab "Explanations".
A load must fulfill certain criteria to be listed in the default view below - see "powder criteria to fulfill to be listed".

Our load data might deviate from other sources - see the "most common reasons for deviations".

All loads are based on the bullet and case dimensions shown under "Load Specifications" - see "reloading suggestions" if you deviate.

You can set your specifications in the "Personalized Load Calculator".

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Our default view only displays powders/loads that fulfill certain criteria: Max pressure of a load <=90% of Max. Standardized Pressure. Fill Rate (Min FR): >80% and <100% for rife loads, >60% and <100% for pistol loads. Min. Propellant Combustion (Min z): >90% for rifle loads , >80% for pistol/revolver loads. Relax these criteria at your own risk to potentially get more powders shown in the load tables.
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.

Click on the desired row in the tables below to add a specific load / powder to your Diary and manage there.

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2208	<<locked>>	84%	40321	90%	**46	98%
[ADI AR 2209]*	<<locked>>	96%	40393	90%	**95	92%
[Accurate 2700]*	<<locked>>	85%	40147	89%	**96	94%
[Accurate 3100]*	<<locked>>	96%	32474	72%	**73	93%
Accurate 4064	<<locked>>	83%	40030	89%	**56	100%
Accurate 4350	<<locked>>	92%	40089	89%	**28	98%
Alliant Reloder- TS 15.5	<<locked>>	84%	40074	89%	**65	99%
Alliant Reloder-16	<<locked>>	92%	39682	88%	**24	98%
Alliant Reloder-17 👍	<<locked>>	88%	40205	89%	**60	99%
[Alliant Reloder-19]*	<<locked>>	96%	39624	88%	**98	92%
Alliant Reloder-23	<<locked>>	97%	32387	72%	**10	97%
Alliant Reloder-26	<<locked>>	96%	35114	78%	**18	96%
Bofors RP3	<<locked>>	84%	39987	89%	**82	99%
[Bofors RP7]*	<<locked>>	87%	39769	88%	**26	94%
Hodgdon H414	<<locked>>	87%	40074	89%	**18	95%
[Hodgdon H4350]*	<<locked>>	93%	39972	89%	**56	94%
Hodgdon Hybrid 100V 👍	<<locked>>	95%	39914	89%	**98	99%
Hodgdon LVR	<<locked>>	89%	39711	88%	**98	97%
[Hodgdon Superperformance]*	<<locked>>	90%	39856	89%	**24	94%
Hodgdon VARGET	<<locked>>	84%	40321	90%	**46	98%
IMR 4064	<<locked>>	84%	39813	89%	**26	98%
IMR 4166 Enduron	<<locked>>	84%	40466	90%	**10	95%
[IMR 4350]*	<<locked>>	92%	40364	90%	**62	94%
IMR 4451 Enduron	<<locked>>	86%	40001	89%	**33	95%
IMR 4831	<<locked>>	97%	39914	89%	**05	98%
Lovex S065	<<locked>>	88%	39929	89%	**42	96%
Lovex S070	<<locked>>	90%	40219	89%	**65	95%
[Norma 204]*	<<locked>>	92%	40306	90%	**92	92%
[Norma MRP]*	<<locked>>	97%	36245	81%	**98	93%
Norma URP	<<locked>>	92%	39624	88%	**11	98%
Ramshot Hunter	<<locked>>	93%	40466	90%	**31	96%
ReloadSwiss RS 60	<<locked>>	87%	40393	90%	**70	100%
ReloadSwiss RS 62	<<locked>>	92%	39856	89%	**41	98%
ReloadSwiss RS 70	<<locked>>	92%	39900	89%	**44	97%
Rottweil R 903 👍	<<locked>>	86%	40408	90%	**78	99%
[Rottweil R 905]*	<<locked>>	96%	37985	84%	**75	92%
[Rottweil R 907]*	<<locked>>	87%	39769	88%	**26	94%
SNPE Vectan SP 11 👍	<<locked>>	85%	40190	89%	**05	99%
SNPE Vectan Tubal 5000	<<locked>>	84%	40118	89%	**73	100%
SNPE Vectan Tubal 7000	<<locked>>	89%	39871	89%	**06	95%
Shooters World Long Rifle	<<locked>>	88%	39929	89%	**42	96%
Somchem S355	<<locked>>	86%	40422	90%	**69	99%
Somchem S365 👍	<<locked>>	96%	39827	89%	**54	100%
[Somchem S385]*	<<locked>>	97%	38595	86%	**75	94%
Vihtavuori N135	<<locked>>	86%	39900	89%	**16	100%
Vihtavuori N150	<<locked>>	91%	40335	90%	**49	100%
Vihtavuori N160	<<locked>>	89%	39639	88%	**75	98%
Vihtavuori N550	<<locked>>	89%	39784	88%	**11	98%
Vihtavuori N555	<<locked>>	97%	34795	77%	**75	97%
Winchester 6.5 StaBALL	<<locked>>	90%	39726	88%	**62	99%
Winchester 760	<<locked>>	87%	40074	89%	**18	95%
Winchester StaBALL HD	<<locked>>	97%	29124	65%	**93	96%
[Winchester Supreme 780]*	<<locked>>	97%	40364	90%	**78	92%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2208	<<locked>>	81%	37028	82%	**83	98%
[ADI AR 2209]*	<<locked>>	92%	35665	79%	**03	90%
[Accurate 2700]*	<<locked>>	81%	35462	79%	**11	92%
[Accurate 3100]*	<<locked>>	90%	26731	59%	**42	90%
Accurate 4064	<<locked>>	81%	37565	84%	**16	100%
[Accurate 4350]*	<<locked>>	81%	27427	61%	**72	93%
Alliant Reloder- TS 15.5	<<locked>>	81%	36738	82%	**10	99%
[Alliant Reloder-16]*	<<locked>>	81%	28514	63%	**75	93%
Alliant Reloder-17	<<locked>>	81%	31299	70%	**77	97%
[Alliant Reloder-19]*	<<locked>>	92%	35099	78%	**06	90%
[Alliant Reloder-23]*	<<locked>>	83%	21886	49%	**14	90%
[Alliant Reloder-26]*	<<locked>>	88%	26469	59%	**95	90%
Bofors RP3	<<locked>>	81%	35926	80%	**10	99%
[Bofors RP7]*	<<locked>>	81%	33040	73%	**98	91%
[Hodgdon H414]*	<<locked>>	81%	32648	73%	**64	92%
[Hodgdon H4350]*	<<locked>>	85%	31415	70%	**85	90%
[Hodgdon Hybrid 100V]*	<<locked>>	81%	26092	58%	**00	94%
[Hodgdon LVR]*	<<locked>>	81%	30864	69%	**18	94%
[Hodgdon Superperformance]*	<<locked>>	84%	32518	72%	**70	90%
Hodgdon VARGET	<<locked>>	81%	37028	82%	**83	98%
IMR 4064	<<locked>>	81%	36521	81%	**70	98%
[IMR 4166 Enduron]*	<<locked>>	81%	36492	81%	**37	94%
[IMR 4350]*	<<locked>>	83%	31024	69%	**78	90%
[IMR 4451 Enduron]*	<<locked>>	81%	34650	77%	**31	93%
[IMR 4831]*	<<locked>>	81%	24424	54%	**70	91%
[Lovex S065]*	<<locked>>	81%	31792	71%	**82	93%
[Lovex S070]*	<<locked>>	81%	30023	67%	**59	91%
[Norma 204]*	<<locked>>	88%	35534	79%	**00	90%
[Norma MRP]*	<<locked>>	92%	31343	70%	**90	90%
[Norma URP]*	<<locked>>	81%	28210	63%	**72	93%
[Ramshot Hunter]*	<<locked>>	81%	28239	63%	**65	90%
ReloadSwiss RS 60	<<locked>>	81%	33446	74%	**33	100%
[ReloadSwiss RS 62]*	<<locked>>	81%	27398	61%	**75	92%
[ReloadSwiss RS 70]*	<<locked>>	81%	27702	62%	**69	91%
Rottweil R 903	<<locked>>	81%	33881	75%	**67	98%
[Rottweil R 905]*	<<locked>>	93%	34301	76%	**00	90%
[Rottweil R 907]*	<<locked>>	81%	33040	73%	**98	91%
SNPE Vectan SP 11	<<locked>>	81%	34766	77%	**03	98%
SNPE Vectan Tubal 5000	<<locked>>	81%	36622	81%	**21	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	81%	30545	68%	**36	91%
[Shooters World Long Rifle]*	<<locked>>	81%	31792	71%	**82	93%
Somchem S355	<<locked>>	81%	34809	77%	**70	98%
Somchem S365	<<locked>>	81%	25150	56%	**29	96%
[Somchem S385]*	<<locked>>	89%	30661	68%	**14	90%
Vihtavuori N135	<<locked>>	81%	34185	76%	**21	100%
Vihtavuori N150	<<locked>>	81%	29849	66%	**52	98%
Vihtavuori N160	<<locked>>	81%	30879	69%	**01	95%
Vihtavuori N550	<<locked>>	81%	30951	69%	**37	95%
[Vihtavuori N555]*	<<locked>>	82%	22046	49%	**47	90%
Winchester 6.5 StaBALL	<<locked>>	81%	29428	65%	**52	96%
[Winchester 760]*	<<locked>>	81%	32648	73%	**64	92%
[Winchester StaBALL HD]*	<<locked>>	90%	23482	52%	**06	90%
[Winchester Supreme 780]*	<<locked>>	93%	35520	79%	**90	90%

Start Load - Barrel Length: 23.60''

Any powder missing? Then click here.

FR ... fill rate of the cartridge in percent

MaxP ... max. pressure of load in psi or bar

% ... max. pressure of load in percent of the maximum allowed pressure for this caliber

V(0) ... muzzle velocity in feet per second (fps) or meters per second (m/s)

z ... powder burnt in percent

[...] *... not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.

[...] ²... fill rate low - you might want to consider using a filler to ensure proper ignition.

[...] ᴾ... possible press load - work up slowly to this load while watching for signs of excessive pressure.

👍 ... recommended powder/load for this caliber and bullet combination based on its ballistic performance.

<<locked>>... you need to buy an access license to unlock the data