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

Recommended Powder(s): Accurate Solo 1250, Alliant BULLSEYE, Alliant UNIQUE, ReloadSwiss RS 20, Vihtavuori N330

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 158gr \| H&N KS HS
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.667" \| 16.9mm
Caliber:	9 x 21 load data
Case Length (l3):	0.830" \| 21.1mm
Cartridge Length (C.O.L.):	1.154" \| 29.3mm
Seated Depth:	0.343" \| 8.7mm
Shank Seated Depth:	0.324" \| 8.2mm
Case Capacity:	15.5 Grains of Water \| 1.01 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B7478_C1232
Last updated:	2025-01-01

Load data for 102 loads in caliber 9 x 21 with .357 | 158gr | H&N KS HS bullet and 51 powders such as Accurate Solo 1250, Alliant BULLSEYE, Alliant UNIQUE, ReloadSwiss RS 20, Vihtavuori N330. 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".

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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%	19116	56%	**0	82%
ADI AP 70N	<<locked>>	80%	29617	87%	**1	100%
ADI APS 350	<<locked>>	80%	30284	89%	**0	100%
ADI APS 450	<<locked>>	82%	30269	89%	**3	100%
ADI AS 30	<<locked>>	88%	29631	87%	**3	100%
ADI AS 50N	<<locked>>	86%	30327	89%	**5	100%
Accurate No. 2	<<locked>>	86%	30501	90%	**8	99%
Accurate No. 5	<<locked>>	72%	29269	86%	**07	92%
Accurate Solo 1000	<<locked>>	86%	29950	88%	**9	100%
Accurate Solo 1250 👍	<<locked>>	96%	30501	89%	**8	100%
Alliant BULLSEYE 👍	<<locked>>	83%	29849	88%	**4	100%
[Alliant POWER PISTOL]*	<<locked>>	96%	29370	86%	**50	89%
Alliant UNIQUE 👍	<<locked>>	96%	28877	85%	**04	100%
Baschieri & Pellagri 100	<<locked>>	88%	28935	85%	**9	100%
Hodgdon Clays	<<locked>>	80%	30574	90%	**3	100%
Hodgdon HP38	<<locked>>	66%	29312	86%	**2	100%
Hodgdon HS-6	<<locked>>	80%	30603	90%	**14	95%
Hodgdon Longshot	<<locked>>	76%	30211	89%	**14	96%
Hodgdon Universal	<<locked>>	89%	29617	87%	**1	100%
Lovex D036	<<locked>>	72%	29399	86%	**07	92%
Lovex S011	<<locked>>	74%	28776	84%	**9	100%
Lovex S020	<<locked>>	86%	28195	83%	**1	100%
Maxam CSB 1	<<locked>>	97%	28340	83%	**5	100%
Maxam CSB 2	<<locked>>	94%	26411	77%	**5	100%
Maxam CSB 3	<<locked>>	91%	29298	86%	**5	100%
Maxam CSB 4	<<locked>>	89%	30211	89%	**9	100%
Maxam CSB 5	<<locked>>	79%	27702	81%	**6	100%
Ramshot Silhouette	<<locked>>	80%	30110	88%	**01	99%
Ramshot True Blue	<<locked>>	73%	28703	84%	**8	96%
Ramshot Zip	<<locked>>	65%	27978	82%	**5	100%
ReloadSwiss RS 12	<<locked>>	85%	29602	87%	**1	100%
ReloadSwiss RS 20 👍	<<locked>>	96%	26905	79%	**4	100%
Rottweil P 801	<<locked>>	78%	29370	86%	**2	100%
[Rottweil P 806]*	<<locked>>	95%	16288	48%	**5	87%
SNPE Vectan A0	<<locked>>	97%	29298	86%	**5	100%
SNPE Vectan BA 9	<<locked>>	86%	28848	85%	**5	100%
SNPE Vectan BA10	<<locked>>	77%	30255	89%	**3	100%
SNPE Vectan BA7 1/2	<<locked>>	94%	23047	68%	**6	92%
SNPE Vectan BA9 1/2	<<locked>>	88%	28471	84%	**5	100%
Shooters World Auto Pistol	<<locked>>	72%	29399	86%	**07	92%
Somchem MP200	<<locked>>	87%	29095	85%	**8	99%
Somchem MS200	<<locked>>	91%	28689	84%	**5	100%
[Somchem S221]*	<<locked>>	85%	30298	89%	**27	86%
Vihtavuori 3N37	<<locked>>	96%	27630	81%	**7	96%
Vihtavuori N310	<<locked>>	70%	29254	86%	**6	100%
Vihtavuori N320	<<locked>>	85%	28195	83%	**5	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	18101	53%	**4	100%
Vihtavuori N330 👍	<<locked>>	91%	29979	88%	**1	100%
Vihtavuori N340	<<locked>>	93%	29254	86%	**4	100%
Vihtavuori N350	<<locked>>	95%	24569	72%	**1	95%
Winchester 231	<<locked>>	72%	27978	82%	**5	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	93%	17579	52%	**3	81%
ADI AP 70N	<<locked>>	60%	16143	47%	**7	100%
ADI APS 350	<<locked>>	60%	18478	54%	**9	100%
[ADI APS 450]²	<<locked>>	59%	16940	50%	**9	100%
ADI AS 30	<<locked>>	60%	14576	43%	**2	100%
ADI AS 50N	<<locked>>	61%	15809	46%	**8	100%
[Accurate No. 2]*	<<locked>>	61%	13692	40%	**2	89%
[Accurate No. 5]*	<<locked>>	60%	19363	57%	**6	85%
Accurate Solo 1000	<<locked>>	60%	15331	45%	**2	100%
Accurate Solo 1250	<<locked>>	60%	11110	33%	**2	96%
Alliant BULLSEYE	<<locked>>	61%	16085	47%	**7	96%
[Alliant POWER PISTOL]*	<<locked>>	78%	17680	52%	**9	80%
[Alliant UNIQUE]*²	<<locked>>	59%	10370	30%	**9	88%
Baschieri & Pellagri 100	<<locked>>	60%	13024	38%	**9	100%
Hodgdon Clays	<<locked>>	60%	18507	54%	**9	100%
Hodgdon HP38	<<locked>>	60%	23989	70%	**9	100%
[Hodgdon HS-6]*	<<locked>>	60%	15592	46%	**4	84%
[Hodgdon Longshot]*	<<locked>>	62%	18188	53%	**6	89%
[Hodgdon Universal]²	<<locked>>	59%	12850	38%	**2	98%
[Lovex D036]*	<<locked>>	60%	19334	57%	**3	85%
Lovex S011	<<locked>>	60%	18666	55%	**1	100%
Lovex S020	<<locked>>	62%	13039	38%	**1	95%
Maxam CSB 1	<<locked>>	60%	10602	31%	**6	95%
Maxam CSB 2	<<locked>>	63%	10327	30%	**5	99%
Maxam CSB 3	<<locked>>	62%	13445	39%	**9	100%
[Maxam CSB 4]²	<<locked>>	59%	13663	40%	**2	100%
Maxam CSB 5	<<locked>>	61%	16998	50%	**8	100%
Ramshot Silhouette	<<locked>>	60%	16114	47%	**4	93%
Ramshot True Blue	<<locked>>	61%	18913	55%	**3	90%
Ramshot Zip	<<locked>>	62%	25353	74%	**6	100%
ReloadSwiss RS 12	<<locked>>	61%	13518	40%	**8	100%
[ReloadSwiss RS 20]*	<<locked>>	60%	9703	28%	**6	89%
Rottweil P 801	<<locked>>	61%	17289	51%	**7	100%
[Rottweil P 806]*	<<locked>>	86%	11821	35%	**0	80%
[SNPE Vectan A0]*²	<<locked>>	59%	10820	32%	**9	88%
SNPE Vectan BA 9	<<locked>>	62%	14634	43%	**8	97%
SNPE Vectan BA10	<<locked>>	60%	19189	56%	**8	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	71%	12473	37%	**9	81%
SNPE Vectan BA9 1/2	<<locked>>	63%	13924	41%	**1	98%
[Shooters World Auto Pistol]*	<<locked>>	60%	19334	57%	**3	85%
Somchem MP200	<<locked>>	62%	13561	40%	**1	91%
Somchem MS200	<<locked>>	62%	12908	38%	**2	93%
[Somchem S221]*	<<locked>>	75%	22118	65%	**2	81%
[Vihtavuori 3N37]*	<<locked>>	65%	10747	32%	**5	80%
Vihtavuori N310	<<locked>>	61%	22872	67%	**7	100%
Vihtavuori N320	<<locked>>	61%	13590	40%	**5	100%
Vihtavuori N32C Tin Star	<<locked>>	76%	11168	33%	**3	100%
Vihtavuori N330	<<locked>>	62%	12096	35%	**8	98%
Vihtavuori N340	<<locked>>	61%	11298	33%	**9	90%
[Vihtavuori N350]*	<<locked>>	69%	11356	33%	**5	82%
Winchester 231	<<locked>>	60%	18811	55%	**4	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