Load data for .50 BMG (12,7 × 99 mm NATO) + .510 | 647gr | Barnes X BT

Recommended Powder(s): IMR 8133 Enduron, Norma 217, ReloadSwiss RS 80, Vihtavuori N568

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.510 \| 647gr \| Barnes X BT
Manufacturer SKU:	51064
Bullet Weight:	647gr \| 41.9g
Bullet Diameter:	0.510" \| 12.95mm
Bullet Length:	1.890" \| 48.0mm
Caliber:	.50 BMG (12,7 × 99 mm NATO) load data
Case Length (l3):	3.900" \| 99.1mm
Cartridge Length (C.O.L.):	5.368" \| 136.4mm
Seated Depth:	0.422" \| 10.7mm
Shank Seated Depth:	0.233" \| 5.9mm
Case Capacity:	300.0 Grains of Water \| 19.48 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	53664 psi \| 3700 bar
LID:	LID_B865_C832
Last updated:	2025-02-02
Recommended Twist Rate:	1:22 - 1:18

Load data for 44 loads in caliber .50 BMG (12,7 × 99 mm NATO) with .510 | 647gr | Barnes X BT bullet and 22 powders such as IMR 8133 Enduron, Norma 217, ReloadSwiss RS 80, Vihtavuori N568. 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".

Go to the bottom of the "My Account " page to set the measure system (imperial vs. metric)
Muzzle velocity vs. barrel length
Every 1 inch additional barrel length increases muzzle velocity by approx. -293.2 fps
C.O.L. (Inch)
C.O.L. (mm)
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.
Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

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.

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 2217	<<locked>>	87%	47993	89%	**23	100%
ADI AR 2218	<<locked>>	91%	48167	90%	**21	97%
ADI AR 2225	<<locked>>	89%	47964	89%	**59	100%
Accurate 8700	<<locked>>	97%	47993	89%	**36	97%
Alliant Reloder-33	<<locked>>	88%	48138	90%	**75	97%
Alliant Reloder-50	<<locked>>	91%	47964	89%	**75	97%
Hodgdon H1000	<<locked>>	87%	47993	89%	**23	100%
Hodgdon Retumbo	<<locked>>	89%	47964	89%	**59	100%
[Hodgdon US 869]*	<<locked>>	94%	48269	90%	**23	92%
[IMR 7977 Enduron]*	<<locked>>	84%	48240	90%	**25	94%
IMR 8133 Enduron 👍	<<locked>>	91%	48037	90%	**46	100%
[Lovex D100]*	<<locked>>	87%	48080	90%	**64	93%
Norma 217 👍	<<locked>>	90%	47921	89%	**52	100%
[Ramshot LRT]*	<<locked>>	91%	48254	90%	**62	92%
ReloadSwiss RS 14	<<locked>>	97%	37855	71%	**63	100%
ReloadSwiss RS 80 👍	<<locked>>	85%	48138	90%	**62	99%
SNPE Vectan SP 13	<<locked>>	96%	48254	90%	**13	96%
[Vihtavuori 20N29]*	<<locked>>	97%	48240	90%	**36	94%
[Vihtavuori 24N41]*	<<locked>>	91%	48022	89%	**20	92%
Vihtavuori N170	<<locked>>	89%	48008	89%	**70	96%
Vihtavuori N568 👍	<<locked>>	85%	48066	90%	**56	99%
Vihtavuori N570	<<locked>>	86%	48124	90%	**89	97%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2217	<<locked>>	81%	39929	74%	**72	98%
[ADI AR 2218]*	<<locked>>	81%	34563	64%	**10	91%
ADI AR 2225	<<locked>>	81%	37347	70%	**56	100%
[Accurate 8700]*	<<locked>>	85%	32605	61%	**08	90%
[Alliant Reloder-33]*	<<locked>>	81%	38145	71%	**82	94%
[Alliant Reloder-50]*	<<locked>>	81%	34098	64%	**80	91%
Hodgdon H1000	<<locked>>	81%	39929	74%	**72	98%
Hodgdon Retumbo	<<locked>>	81%	37347	70%	**56	100%
[Hodgdon US 869]*	<<locked>>	91%	43453	81%	**31	90%
[IMR 7977 Enduron]*	<<locked>>	81%	44454	83%	**62	93%
IMR 8133 Enduron	<<locked>>	81%	35317	66%	**93	97%
[Lovex D100]*	<<locked>>	83%	41437	77%	**43	90%
Norma 217	<<locked>>	81%	35868	67%	**16	99%
[Ramshot LRT]*	<<locked>>	88%	43207	81%	**67	90%
ReloadSwiss RS 14	<<locked>>	94%	36666	68%	**44	100%
ReloadSwiss RS 80	<<locked>>	81%	41742	78%	**38	97%
[SNPE Vectan SP 13]*	<<locked>>	83%	32764	61%	**98	90%
[Vihtavuori 20N29]*	<<locked>>	89%	37246	69%	**20	90%
[Vihtavuori 24N41]*	<<locked>>	87%	43279	81%	**31	90%
[Vihtavuori N170]*	<<locked>>	81%	38609	72%	**83	93%
Vihtavuori N568	<<locked>>	81%	42786	80%	**54	97%
Vihtavuori N570	<<locked>>	81%	41017	76%	**48	95%

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.