Load data for .338 ARC + .338 | 250gr | Speer Grand Slam

Recommended Powder(s): ADI AR 2207, Alliant Reloder-10x, Baschieri & Pellagri 106, IMR 4198, Norma 200

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.338 \| 250gr \| Speer Grand Slam
Manufacturer SKU:	2408
Bullet Weight:	250gr \| 16.2g
Bullet Diameter:	0.338" \| 8.59mm
Bullet Length:	1.230" \| 31.2mm
Caliber:	.338 ARC load data
Case Length (l3):	1.300" \| 33.0mm
Cartridge Length (C.O.L.):	2.226" \| 56.5mm
Seated Depth:	0.304" \| 7.7mm
Shank Seated Depth:	0.304" \| 7.7mm
Case Capacity:	36.0 Grains of Water \| 2.34 cm³
Primer Size:	Small Rifle (SR)
Max. allowed Pressure:	51996 psi \| 3585 bar
LID:	LID_B6195_C460
Last updated:	2025-02-02

Load data for 78 loads in caliber .338 ARC with .338 | 250gr | Speer Grand Slam bullet and 39 powders such as ADI AR 2207, Alliant Reloder-10x, Baschieri & Pellagri 106, IMR 4198, Norma 200. 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. 13.9 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
ADI AR 2207 👍	<<locked>>	93%	45527	88%	**70	100%
ADI AR 2219	<<locked>>	96%	45324	87%	**09	98%
Accurate 1680	<<locked>>	84%	45803	88%	**41	99%
Accurate 2015	<<locked>>	97%	37173	72%	**95	99%
[Accurate 2230]*	<<locked>>	96%	39726	76%	**11	92%
[Accurate 2460]*	<<locked>>	96%	38319	74%	**18	94%
Accurate 2495	<<locked>>	96%	27717	53%	**36	96%
[Accurate 2520]*	<<locked>>	97%	31517	61%	**49	92%
Alliant AR-Comp	<<locked>>	96%	33040	64%	**75	99%
Alliant Reloder-10x 👍	<<locked>>	97%	41901	81%	**60	100%
Alliant Reloder-7	<<locked>>	92%	45281	87%	**44	100%
Baschieri & Pellagri 106 👍	<<locked>>	96%	46209	89%	**44	99%
[Hodgdon Benchmark]*	<<locked>>	96%	38986	75%	**68	93%
[Hodgdon CFE BLK]*	<<locked>>	92%	46122	89%	**24	94%
Hodgdon H322	<<locked>>	97%	37956	73%	**11	97%
Hodgdon H335	<<locked>>	97%	45208	87%	**16	97%
Hodgdon H4198	<<locked>>	93%	46006	88%	**21	98%
[IMR 3031]*	<<locked>>	96%	28442	55%	**93	94%
IMR 4198 👍	<<locked>>	96%	44019	85%	**34	100%
IMR 4227	<<locked>>	86%	45672	88%	**98	100%
[Lovex D073.4]*	<<locked>>	96%	40640	78%	**34	94%
[Lovex D073.5]*	<<locked>>	97%	39088	75%	**27	94%
Lovex S053	<<locked>>	87%	45672	88%	**81	100%
Norma 200 👍	<<locked>>	96%	46731	90%	**03	100%
[Norma 202]*	<<locked>>	96%	31720	61%	**29	94%
ReloadSwiss RS 36	<<locked>>	87%	45643	88%	**34	100%
ReloadSwiss RS 40	<<locked>>	97%	41437	80%	**47	95%
Rottweil R 901	<<locked>>	97%	35491	68%	**62	95%
SNPE Vectan BA6 1/2	<<locked>>	91%	46731	90%	**83	100%
SNPE Vectan SP 10	<<locked>>	96%	45281	87%	**16	97%
SNPE Vectan Tubal 3000	<<locked>>	97%	35592	68%	**16	95%
[Shooters World Tactical Rifle]*	<<locked>>	96%	44005	85%	**37	93%
[Somchem S321]*	<<locked>>	96%	37231	72%	**11	92%
Somchem S335	<<locked>>	96%	33446	64%	**13	95%
Vihtavuori N120	<<locked>>	96%	46427	89%	**41	100%
Vihtavuori N130	<<locked>>	96%	38798	75%	**72	99%
Vihtavuori N133	<<locked>>	96%	31981	62%	**77	97%
[Vihtavuori N530]*	<<locked>>	96%	37144	71%	**91	92%
[Winchester 748]*	<<locked>>	96%	36956	71%	**14	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2207	<<locked>>	81%	31444	60%	**86	100%
[ADI AR 2219]*	<<locked>>	82%	28601	55%	**50	93%
Accurate 1680	<<locked>>	81%	40886	79%	**81	98%
Accurate 2015	<<locked>>	87%	27905	54%	**44	96%
[Accurate 2230]*	<<locked>>	93%	35389	68%	**49	90%
[Accurate 2460]*	<<locked>>	89%	29675	57%	**80	90%
[Accurate 2495]*	<<locked>>	92%	23728	46%	**54	94%
[Accurate 2520]*	<<locked>>	92%	27238	52%	**70	90%
Alliant AR-Comp	<<locked>>	89%	26687	51%	**57	97%
Alliant Reloder-10x	<<locked>>	83%	27862	54%	**47	97%
Alliant Reloder-7	<<locked>>	81%	32779	63%	**77	99%
Baschieri & Pellagri 106	<<locked>>	84%	32024	62%	**50	95%
[Hodgdon Benchmark]*	<<locked>>	89%	31589	61%	**54	91%
[Hodgdon CFE BLK]*	<<locked>>	82%	33547	65%	**50	90%
[Hodgdon H322]*	<<locked>>	87%	28601	55%	**50	93%
[Hodgdon H335]*	<<locked>>	82%	27963	54%	**44	91%
Hodgdon H4198	<<locked>>	82%	33286	64%	**44	95%
[IMR 3031]*	<<locked>>	93%	26469	51%	**50	93%
IMR 4198	<<locked>>	83%	30748	59%	**44	98%
IMR 4227	<<locked>>	81%	39160	75%	**19	100%
[Lovex D073.4]*	<<locked>>	86%	29283	56%	**60	90%
[Lovex D073.5]*	<<locked>>	88%	29051	56%	**70	90%
Lovex S053	<<locked>>	81%	37956	73%	**93	100%
Norma 200	<<locked>>	81%	28964	56%	**57	98%
[Norma 202]*	<<locked>>	92%	27601	53%	**50	91%
ReloadSwiss RS 36	<<locked>>	81%	38072	73%	**42	100%
[ReloadSwiss RS 40]*	<<locked>>	86%	29051	56%	**47	91%
[Rottweil R 901]*	<<locked>>	90%	28819	55%	**47	92%
SNPE Vectan BA6 1/2	<<locked>>	88%	43540	84%	**54	100%
[SNPE Vectan SP 10]*	<<locked>>	81%	27804	53%	**44	91%
[SNPE Vectan Tubal 3000]*	<<locked>>	93%	31792	61%	**57	93%
[Shooters World Tactical Rifle]*	<<locked>>	90%	35288	68%	**19	90%
[Somchem S321]*	<<locked>>	92%	32619	63%	**36	91%
[Somchem S335]*	<<locked>>	93%	30182	58%	**57	94%
Vihtavuori N120	<<locked>>	82%	30734	59%	**44	100%
Vihtavuori N130	<<locked>>	87%	29994	58%	**40	97%
Vihtavuori N133	<<locked>>	94%	29878	57%	**40	96%
[Vihtavuori N530]*	<<locked>>	91%	32111	62%	**09	90%
[Winchester 748]*	<<locked>>	92%	32213	62%	**29	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