Load data for .375 SOCOM + .375 | 255gr | Winchester Soft-Point

Recommended Powder(s): Alliant AR-Comp

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.375 \| 255gr \| Winchester Soft-Point
Bullet Weight:	255gr \| 16.5g
Bullet Diameter:	0.375" \| 9.52mm
Bullet Length:	1.000" \| 25.4mm
Caliber:	.375 SOCOM load data
Case Length (l3):	1.575" \| 40.0mm
Cartridge Length (C.O.L.):	2.226" \| 56.5mm
Seated Depth:	0.349" \| 8.9mm
Shank Seated Depth:	0.349" \| 8.9mm
Case Capacity:	60.0 Grains of Water \| 3.90 cm³
Primer Size:	Large Pistol Magnum (LPM)
Max. allowed Pressure:	34954 psi \| 2410 bar
LID:	LID_B6655_C570
Last updated:	2025-02-02

Load data for 44 loads in caliber .375 SOCOM with .375 | 255gr | Winchester Soft-Point bullet and 22 powders such as Alliant AR-Comp. 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 "Dashboard " 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. 19.7 fps
C.O.L. (Inch)
C.O.L. (mm)
We recommend you limit powder range to relevant brands to speed up re-calculation of results
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.
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
Accurate 2015	<<locked>>	85%	31372	90%	**14	98%
[Accurate 2460]*	<<locked>>	84%	30893	88%	**14	92%
Accurate 2495	<<locked>>	92%	31140	89%	**00	98%
[Accurate 2520]*	<<locked>>	90%	31009	89%	**67	93%
Accurate 4064	<<locked>>	97%	30095	86%	**70	95%
Alliant AR-Comp 👍	<<locked>>	88%	31198	89%	**73	99%
[Hodgdon Benchmark]*	<<locked>>	83%	31125	89%	**55	91%
Hodgdon H322	<<locked>>	84%	30966	89%	**18	95%
IMR 3031	<<locked>>	93%	30922	88%	**73	96%
[Lovex D073.5]*	<<locked>>	84%	31154	89%	**14	92%
[Lovex D073.6]*	<<locked>>	92%	31430	90%	**77	94%
[Norma 202]*	<<locked>>	90%	31256	89%	**41	94%
[Rottweil R 901]*	<<locked>>	86%	31401	90%	**05	94%
[SNPE Vectan Tubal 3000]*	<<locked>>	87%	31314	90%	**59	94%
SNPE Vectan Tubal 5000	<<locked>>	94%	31299	90%	**72	95%
[Shooters World Match Rifle]*	<<locked>>	92%	31430	90%	**77	94%
Somchem S335	<<locked>>	88%	31357	90%	**85	95%
Vihtavuori N130	<<locked>>	83%	31343	90%	**72	98%
Vihtavuori N133	<<locked>>	89%	31140	89%	**78	97%
Vihtavuori N135	<<locked>>	97%	28718	82%	**95	96%
[Vihtavuori N140]*	<<locked>>	91%	30908	88%	**11	94%
[Vihtavuori N540]*	<<locked>>	92%	31357	90%	**44	94%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
Accurate 2015	<<locked>>	81%	27876	80%	**42	97%
[Accurate 2460]*	<<locked>>	81%	28268	81%	**55	91%
[Accurate 2495]*	<<locked>>	81%	21640	62%	**73	94%
[Accurate 2520]*	<<locked>>	83%	25237	72%	**26	90%
[Accurate 4064]*	<<locked>>	86%	21857	63%	**67	90%
Alliant AR-Comp	<<locked>>	81%	24627	70%	**16	97%
[Hodgdon Benchmark]*	<<locked>>	81%	29167	83%	**16	90%
[Hodgdon H322]*	<<locked>>	81%	27905	80%	**52	94%
[IMR 3031]*	<<locked>>	81%	21857	63%	**24	91%
[Lovex D073.5]*	<<locked>>	81%	28021	80%	**49	91%
[Lovex D073.6]*	<<locked>>	86%	25469	73%	**32	90%
[Norma 202]*	<<locked>>	81%	23931	68%	**60	90%
[Rottweil R 901]*	<<locked>>	81%	26992	77%	**03	92%
[SNPE Vectan Tubal 3000]*	<<locked>>	81%	26397	76%	**50	92%
[SNPE Vectan Tubal 5000]*	<<locked>>	82%	22495	64%	**59	90%
[Shooters World Match Rifle]*	<<locked>>	86%	25469	73%	**32	90%
[Somchem S335]*	<<locked>>	81%	25498	73%	**54	93%
Vihtavuori N130	<<locked>>	81%	29312	84%	**29	98%
[Vihtavuori N133]*	<<locked>>	81%	24671	71%	**31	94%
[Vihtavuori N135]*	<<locked>>	84%	20291	58%	**62	90%
[Vihtavuori N140]*	<<locked>>	83%	23888	68%	**34	90%
[Vihtavuori N540]*	<<locked>>	84%	24671	71%	**80	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