Load data for 9 x 21 + .357 | 158gr | H&N KS KB

Recommended Powder(s): Alliant BULLSEYE, Alliant UNIQUE, Ramshot Silhouette, ReloadSwiss RS 20, Vihtavuori N340

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 158gr \| H&N KS KB
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.642" \| 16.3mm
Caliber:	9 x 21 load data
Case Length (l3):	0.830" \| 21.1mm
Cartridge Length (C.O.L.):	1.154" \| 29.3mm
Seated Depth:	0.318" \| 8.1mm
Shank Seated Depth:	0.299" \| 7.6mm
Case Capacity:	15.5 Grains of Water \| 1.01 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B7479_C1232
Last updated:	2025-01-01

Load data for 104 loads in caliber 9 x 21 with .357 | 158gr | H&N KS KB bullet and 52 powders such as Alliant BULLSEYE, Alliant UNIQUE, Ramshot Silhouette, ReloadSwiss RS 20, Vihtavuori N340. 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>>	95%	19783	58%	**6	84%
ADI AP 70N	<<locked>>	77%	28848	85%	**4	100%
ADI APS 350	<<locked>>	78%	30124	88%	**7	100%
ADI APS 450	<<locked>>	80%	29776	87%	**6	100%
ADI AS 30	<<locked>>	85%	29254	86%	**6	100%
ADI AS 50N	<<locked>>	83%	29762	87%	**8	100%
Accurate No. 2	<<locked>>	82%	28921	85%	**5	99%
Accurate No. 5	<<locked>>	70%	29675	87%	**40	93%
Accurate Solo 1000	<<locked>>	83%	29414	86%	**5	100%
Accurate Solo 1250	<<locked>>	91%	29370	86%	**5	100%
Alliant BULLSEYE 👍	<<locked>>	79%	28964	85%	**04	100%
Alliant POWER PISTOL	<<locked>>	94%	29805	87%	**76	91%
Alliant UNIQUE 👍	<<locked>>	95%	30385	89%	**37	100%
Baschieri & Pellagri 100	<<locked>>	84%	28079	82%	**9	100%
Hodgdon Clays	<<locked>>	78%	30443	89%	**0	100%
Hodgdon HP38	<<locked>>	63%	28369	83%	**2	100%
Hodgdon HS-6	<<locked>>	75%	28543	84%	**14	95%
Hodgdon Longshot	<<locked>>	72%	28355	83%	**17	96%
Hodgdon Universal	<<locked>>	85%	28848	85%	**4	100%
Lovex D036	<<locked>>	70%	29617	87%	**40	93%
Lovex S011	<<locked>>	71%	27920	82%	**2	100%
Lovex S020	<<locked>>	85%	29994	88%	**7	100%
Maxam CSB 1	<<locked>>	96%	29776	87%	**8	100%
Maxam CSB 2	<<locked>>	93%	28253	83%	**8	100%
Maxam CSB 3	<<locked>>	87%	28558	84%	**5	100%
Maxam CSB 4	<<locked>>	85%	29588	87%	**2	100%
Maxam CSB 5	<<locked>>	80%	30371	89%	**9	100%
Ramshot Silhouette 👍	<<locked>>	75%	28572	84%	**10	99%
Ramshot True Blue	<<locked>>	71%	29095	85%	**20	97%
Ramshot Zip	<<locked>>	65%	29631	87%	**8	100%
ReloadSwiss RS 12	<<locked>>	82%	28790	84%	**1	100%
ReloadSwiss RS 20 👍	<<locked>>	95%	28050	82%	**17	100%
[ReloadSwiss RS 24]*	<<locked>>	95%	27978	82%	**40	83%
Rottweil P 801	<<locked>>	75%	28645	84%	**8	100%
Rottweil P 806	<<locked>>	96%	18956	56%	**7	91%
SNPE Vectan A0	<<locked>>	96%	30313	89%	**4	100%
SNPE Vectan BA 9	<<locked>>	85%	29979	88%	**5	100%
SNPE Vectan BA10	<<locked>>	74%	29762	87%	**6	100%
SNPE Vectan BA7 1/2	<<locked>>	95%	25469	75%	**1	94%
SNPE Vectan BA9 1/2	<<locked>>	88%	30008	88%	**1	100%
Shooters World Auto Pistol	<<locked>>	70%	29617	87%	**40	93%
Somchem MP200	<<locked>>	86%	30240	89%	**20	100%
Somchem MS200	<<locked>>	90%	30008	88%	**01	100%
[Somchem S221]*	<<locked>>	82%	29733	87%	**47	87%
Vihtavuori 3N37	<<locked>>	96%	30618	90%	**56	98%
Vihtavuori N310	<<locked>>	68%	29283	86%	**3	100%
Vihtavuori N320	<<locked>>	82%	27833	82%	**5	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	20044	59%	**7	100%
Vihtavuori N330	<<locked>>	87%	28877	85%	**8	100%
Vihtavuori N340 👍	<<locked>>	92%	30487	89%	**10	100%
Vihtavuori N350	<<locked>>	96%	27499	81%	**14	97%
Winchester 231	<<locked>>	72%	29631	87%	**8	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	89%	16853	49%	**0	81%
ADI AP 70N	<<locked>>	61%	18028	53%	**3	100%
[ADI APS 350]²	<<locked>>	59%	19102	56%	**2	100%
ADI APS 450	<<locked>>	63%	19551	57%	**8	100%
[ADI AS 30]²	<<locked>>	59%	15214	45%	**5	100%
ADI AS 50N	<<locked>>	60%	16186	47%	**1	100%
[Accurate No. 2]²	<<locked>>	59%	13735	40%	**1	90%
[Accurate No. 5]*	<<locked>>	61%	21785	64%	**8	88%
[Accurate Solo 1000]²	<<locked>>	59%	15664	46%	**1	100%
Accurate Solo 1250	<<locked>>	62%	12952	38%	**5	98%
[Alliant BULLSEYE]²	<<locked>>	59%	16157	47%	**4	96%
[Alliant POWER PISTOL]*	<<locked>>	74%	17100	50%	**6	81%
Alliant UNIQUE	<<locked>>	61%	11879	35%	**1	92%
Baschieri & Pellagri 100	<<locked>>	62%	15113	44%	**8	100%
[Hodgdon Clays]²	<<locked>>	59%	19174	56%	**2	100%
Hodgdon HP38	<<locked>>	60%	25918	76%	**5	100%
[Hodgdon HS-6]*	<<locked>>	62%	17840	52%	**0	88%
Hodgdon Longshot	<<locked>>	61%	19174	56%	**3	91%
Hodgdon Universal	<<locked>>	61%	14605	43%	**4	99%
[Lovex D036]*	<<locked>>	61%	21756	64%	**8	88%
Lovex S011	<<locked>>	61%	20711	61%	**7	100%
Lovex S020	<<locked>>	60%	13256	39%	**1	96%
Maxam CSB 1	<<locked>>	63%	12343	36%	**9	98%
Maxam CSB 2	<<locked>>	61%	10863	32%	**8	100%
Maxam CSB 3	<<locked>>	61%	13866	41%	**8	100%
Maxam CSB 4	<<locked>>	62%	15853	47%	**1	100%
Maxam CSB 5	<<locked>>	60%	17593	52%	**8	100%
Ramshot Silhouette	<<locked>>	60%	17361	51%	**6	95%
Ramshot True Blue	<<locked>>	60%	19638	58%	**9	92%
Ramshot Zip	<<locked>>	60%	24845	73%	**9	100%
ReloadSwiss RS 12	<<locked>>	62%	15621	46%	**4	100%
ReloadSwiss RS 20	<<locked>>	62%	10965	32%	**8	93%
[ReloadSwiss RS 24]*	<<locked>>	93%	26121	77%	**14	81%
Rottweil P 801	<<locked>>	62%	19464	57%	**7	100%
[Rottweil P 806]*	<<locked>>	81%	11110	33%	**7	80%
SNPE Vectan A0	<<locked>>	61%	12270	36%	**9	91%
SNPE Vectan BA 9	<<locked>>	60%	14605	43%	**5	98%
SNPE Vectan BA10	<<locked>>	63%	21944	64%	**4	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	66%	11139	33%	**2	80%
SNPE Vectan BA9 1/2	<<locked>>	61%	14069	41%	**8	99%
[Shooters World Auto Pistol]*	<<locked>>	61%	21756	64%	**8	88%
Somchem MP200	<<locked>>	62%	14968	44%	**7	94%
Somchem MS200	<<locked>>	60%	13068	38%	**1	94%
[Somchem S221]*	<<locked>>	71%	20885	61%	**5	81%
[Vihtavuori 3N37]*	<<locked>>	62%	10733	31%	**2	81%
Vihtavuori N310	<<locked>>	60%	23250	68%	**7	100%
Vihtavuori N320	<<locked>>	60%	14112	41%	**5	100%
Vihtavuori N32C Tin Star	<<locked>>	75%	11647	34%	**9	100%
Vihtavuori N330	<<locked>>	60%	12372	36%	**8	99%
[Vihtavuori N340]²	<<locked>>	59%	11414	33%	**2	91%
[Vihtavuori N350]*	<<locked>>	63%	10167	30%	**9	80%
Winchester 231	<<locked>>	61%	20581	60%	**6	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.

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