Load data for 9 x 21 + .357 | 158gr | Speer JSP

Recommended Powder(s): Alliant BULLSEYE, Alliant UNIQUE, Ramshot Silhouette, ReloadSwiss RS 20, Somchem MP200

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 158gr \| Speer JSP
Manufacturer SKU:	4217
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.630" \| 16.0mm
Caliber:	9 x 21 load data
Case Length (l3):	0.830" \| 21.1mm
Cartridge Length (C.O.L.):	1.154" \| 29.3mm
Seated Depth:	0.306" \| 7.8mm
Shank Seated Depth:	0.306" \| 7.8mm
Case Capacity:	15.5 Grains of Water \| 1.01 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B6224_C1232
Last updated:	2025-01-01

Load data for 102 loads in caliber 9 x 21 with .357 | 158gr | Speer JSP bullet and 51 powders such as Alliant BULLSEYE, Alliant UNIQUE, Ramshot Silhouette, ReloadSwiss RS 20, Somchem MP200. 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.

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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 AP 100]*	<<locked>>	97%	22423	66%	**8	87%
ADI AP 70N	<<locked>>	76%	30400	89%	**1	100%
ADI APS 350	<<locked>>	72%	27746	81%	**1	100%
ADI APS 450	<<locked>>	79%	30313	89%	**6	100%
ADI AS 30	<<locked>>	84%	30647	90%	**9	100%
ADI AS 50N	<<locked>>	78%	28500	84%	**5	100%
Accurate No. 2	<<locked>>	81%	29863	88%	**1	99%
Accurate No. 5	<<locked>>	69%	30385	89%	**43	94%
Accurate Solo 1000	<<locked>>	82%	30008	88%	**5	100%
Accurate Solo 1250	<<locked>>	90%	30313	89%	**8	100%
Alliant BULLSEYE 👍	<<locked>>	78%	29660	87%	**07	100%
Alliant POWER PISTOL	<<locked>>	90%	28790	84%	**56	90%
Alliant UNIQUE 👍	<<locked>>	90%	29283	86%	**20	100%
Baschieri & Pellagri 100	<<locked>>	83%	29240	86%	**5	100%
Hodgdon Clays	<<locked>>	72%	27891	82%	**4	100%
Hodgdon HS-6	<<locked>>	74%	29356	86%	**20	95%
Hodgdon Longshot	<<locked>>	71%	29312	86%	**20	97%
Hodgdon Universal	<<locked>>	84%	30400	89%	**1	100%
Lovex D036	<<locked>>	69%	30327	89%	**43	94%
Lovex S011	<<locked>>	70%	28558	84%	**2	100%
Lovex S020	<<locked>>	81%	28427	83%	**8	100%
Maxam CSB 1	<<locked>>	91%	28355	83%	**5	100%
Maxam CSB 2	<<locked>>	92%	30052	88%	**4	100%
Maxam CSB 3	<<locked>>	86%	29544	87%	**8	100%
Maxam CSB 4	<<locked>>	84%	30472	89%	**2	100%
Maxam CSB 5	<<locked>>	75%	28311	83%	**3	100%
Ramshot Silhouette 👍	<<locked>>	74%	29414	86%	**14	100%
Ramshot True Blue	<<locked>>	70%	30008	88%	**24	97%
Ramshot Zip	<<locked>>	64%	30560	90%	**5	100%
ReloadSwiss RS 12	<<locked>>	81%	30560	90%	**8	100%
ReloadSwiss RS 20 👍	<<locked>>	93%	28993	85%	**24	100%
[ReloadSwiss RS 24]*	<<locked>>	94%	29022	85%	**50	83%
Rottweil P 801	<<locked>>	74%	30501	90%	**5	100%
Rottweil P 806	<<locked>>	95%	20595	60%	**14	92%
SNPE Vectan A0	<<locked>>	91%	28921	85%	**5	100%
SNPE Vectan BA 9	<<locked>>	84%	30618	90%	**8	100%
SNPE Vectan BA10	<<locked>>	73%	30298	89%	**6	100%
SNPE Vectan BA7 1/2	<<locked>>	94%	26600	78%	**1	95%
SNPE Vectan BA9 1/2	<<locked>>	83%	28761	84%	**8	100%
Shooters World Auto Pistol	<<locked>>	69%	30327	89%	**43	94%
Somchem MP200 👍	<<locked>>	82%	28819	85%	**7	100%
Somchem MS200	<<locked>>	86%	28863	85%	**8	100%
[Somchem S221]*	<<locked>>	79%	29182	86%	**33	87%
Vihtavuori 3N37	<<locked>>	92%	29182	86%	**30	97%
Vihtavuori N310	<<locked>>	67%	30226	89%	**3	100%
Vihtavuori N320	<<locked>>	81%	28790	84%	**8	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	21712	64%	**4	100%
Vihtavuori N330	<<locked>>	86%	29994	88%	**1	100%
Vihtavuori N340	<<locked>>	88%	29051	85%	**8	100%
Vihtavuori N350	<<locked>>	95%	28587	84%	**20	97%
Winchester 231	<<locked>>	71%	30560	90%	**5	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	84%	16592	49%	**3	81%
ADI AP 70N	<<locked>>	61%	19725	58%	**6	100%
ADI APS 350	<<locked>>	63%	22408	66%	**5	100%
ADI APS 450	<<locked>>	62%	20320	60%	**8	100%
ADI AS 30	<<locked>>	63%	18521	54%	**1	100%
[ADI AS 50N]²	<<locked>>	59%	17608	52%	**8	100%
Accurate No. 2	<<locked>>	62%	16317	48%	**4	93%
[Accurate No. 5]*	<<locked>>	61%	22698	67%	**8	89%
Accurate Solo 1000	<<locked>>	62%	18536	54%	**8	100%
Accurate Solo 1250	<<locked>>	61%	13924	41%	**5	99%
Alliant BULLSEYE	<<locked>>	62%	18942	56%	**6	98%
[Alliant POWER PISTOL]*	<<locked>>	71%	16882	50%	**0	80%
Alliant UNIQUE	<<locked>>	60%	13314	39%	**8	93%
Baschieri & Pellagri 100	<<locked>>	61%	16172	47%	**5	100%
Hodgdon Clays	<<locked>>	63%	22524	66%	**5	100%
[Hodgdon HS-6]*	<<locked>>	61%	19000	56%	**3	89%
Hodgdon Longshot	<<locked>>	60%	20247	59%	**2	92%
Hodgdon Universal	<<locked>>	60%	16288	48%	**7	100%
[Lovex D036]*	<<locked>>	61%	22655	66%	**5	89%
Lovex S011	<<locked>>	60%	21524	63%	**0	100%
Lovex S020	<<locked>>	62%	16085	47%	**7	98%
Maxam CSB 1	<<locked>>	62%	13503	40%	**8	98%
Maxam CSB 2	<<locked>>	60%	12531	37%	**8	100%
Maxam CSB 3	<<locked>>	60%	14968	44%	**8	100%
Maxam CSB 4	<<locked>>	61%	16897	50%	**1	100%
Maxam CSB 5	<<locked>>	60%	18608	55%	**1	100%
Ramshot Silhouette	<<locked>>	62%	20001	59%	**9	96%
Ramshot True Blue	<<locked>>	62%	22321	65%	**2	93%
Ramshot Zip	<<locked>>	61%	28166	83%	**8	100%
ReloadSwiss RS 12	<<locked>>	61%	17492	51%	**3	100%
ReloadSwiss RS 20	<<locked>>	61%	12053	35%	**1	94%
[ReloadSwiss RS 24]*	<<locked>>	89%	25092	74%	**4	80%
Rottweil P 801	<<locked>>	62%	21205	62%	**6	100%
[Rottweil P 806]*	<<locked>>	75%	11211	33%	**4	80%
SNPE Vectan A0	<<locked>>	61%	13256	39%	**2	92%
SNPE Vectan BA 9	<<locked>>	62%	16969	50%	**7	99%
SNPE Vectan BA10	<<locked>>	62%	22524	66%	**8	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	62%	11298	33%	**9	80%
SNPE Vectan BA9 1/2	<<locked>>	60%	15302	45%	**1	99%
[Shooters World Auto Pistol]*	<<locked>>	61%	22655	66%	**5	89%
Somchem MP200	<<locked>>	62%	16288	48%	**0	95%
[Somchem MS200]²	<<locked>>	59%	14315	42%	**5	95%
[Somchem S221]*	<<locked>>	68%	20914	61%	**2	81%
[Vihtavuori 3N37]*	<<locked>>	61%	11966	35%	**8	83%
[Vihtavuori N310]²	<<locked>>	59%	24352	71%	**0	100%
Vihtavuori N320	<<locked>>	62%	17332	51%	**4	100%
Vihtavuori N32C Tin Star	<<locked>>	69%	11748	34%	**3	100%
Vihtavuori N330	<<locked>>	60%	13634	40%	**1	100%
Vihtavuori N340	<<locked>>	62%	14098	41%	**1	94%
[Vihtavuori N350]*	<<locked>>	62%	11414	33%	**9	83%
Winchester 231	<<locked>>	60%	21611	63%	**0	100%

Start Load - Barrel Length: 5.50''

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.

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