Load data for 9 x 21 + .357 | 127gr | H&N KS HS

Recommended Powder(s): Accurate Solo 1250, Alliant BULLSEYE, Alliant UNIQUE, ReloadSwiss RS 20, Vihtavuori N340

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 127gr \| H&N KS HS
Bullet Weight:	127gr \| 8.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.570" \| 14.5mm
Caliber:	9 x 21 load data
Case Length (l3):	0.830" \| 21.1mm
Cartridge Length (C.O.L.):	1.154" \| 29.3mm
Seated Depth:	0.246" \| 6.3mm
Shank Seated Depth:	0.246" \| 6.3mm
Case Capacity:	15.5 Grains of Water \| 1.01 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B7469_C1232
Last updated:	2025-01-01

Load data for 104 loads in caliber 9 x 21 with .357 | 127gr | H&N KS HS bullet and 52 powders such as Accurate Solo 1250, Alliant BULLSEYE, Alliant UNIQUE, 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.

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%	20291	60%	**60	83%
ADI AP 70N	<<locked>>	79%	29805	87%	**81	100%
ADI APS 350	<<locked>>	75%	28340	83%	**1	100%
ADI APS 450	<<locked>>	80%	29399	86%	**14	100%
ADI AS 30	<<locked>>	84%	28514	84%	**60	100%
ADI AS 50N	<<locked>>	84%	30182	89%	**25	100%
Accurate No. 2	<<locked>>	84%	30313	89%	**58	98%
Accurate No. 5	<<locked>>	70%	29298	86%	**17	91%
Accurate Solo 1000	<<locked>>	85%	30298	89%	**99	100%
Accurate Solo 1250 👍	<<locked>>	94%	30632	90%	**61	100%
Alliant BULLSEYE 👍	<<locked>>	82%	30342	89%	**11	100%
[Alliant POWER PISTOL]*	<<locked>>	93%	28950	85%	**50	88%
Alliant UNIQUE 👍	<<locked>>	95%	30110	88%	**24	100%
Baschieri & Pellagri 100	<<locked>>	88%	30284	89%	**09	100%
Hodgdon Clays	<<locked>>	75%	28631	84%	**4	100%
Hodgdon HP38	<<locked>>	65%	29878	88%	**35	100%
Hodgdon HS-6	<<locked>>	77%	29501	87%	**07	94%
Hodgdon Longshot	<<locked>>	74%	29834	88%	**17	96%
Hodgdon Universal	<<locked>>	87%	29805	87%	**81	100%
Hodgdon TrailBoss	<<locked>>	96%	8267	24%	**5	99%
Lovex D036	<<locked>>	70%	29254	86%	**14	91%
Lovex S011	<<locked>>	74%	30618	90%	**29	100%
Lovex S020	<<locked>>	86%	29863	88%	**84	100%
Maxam CSB 1	<<locked>>	94%	28282	83%	**32	100%
Maxam CSB 2	<<locked>>	95%	28732	84%	**71	100%
Maxam CSB 3	<<locked>>	91%	30647	90%	**42	100%
Maxam CSB 4	<<locked>>	86%	30139	88%	**15	100%
Maxam CSB 5	<<locked>>	80%	29414	86%	**60	100%
Ramshot Silhouette	<<locked>>	77%	29428	86%	**01	99%
Ramshot True Blue	<<locked>>	73%	30574	90%	**20	96%
Ramshot Zip	<<locked>>	64%	28689	84%	**32	100%
ReloadSwiss RS 12	<<locked>>	84%	29892	88%	**68	100%
ReloadSwiss RS 20 👍	<<locked>>	97%	29457	86%	**24	100%
Rottweil P 801	<<locked>>	77%	30240	89%	**35	100%
[Rottweil P 806]*	<<locked>>	96%	18260	54%	**45	88%
SNPE Vectan A0	<<locked>>	96%	30081	88%	**65	100%
SNPE Vectan BA 9	<<locked>>	86%	30168	89%	**48	100%
SNPE Vectan BA10	<<locked>>	74%	29385	86%	**14	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	25425	75%	**32	93%
SNPE Vectan BA9 1/2	<<locked>>	87%	28601	84%	**48	100%
Shooters World Auto Pistol	<<locked>>	70%	29254	86%	**14	91%
Somchem MP200	<<locked>>	86%	29515	87%	**01	99%
Somchem MS200	<<locked>>	91%	30139	88%	**84	100%
[Somchem S221]*	<<locked>>	83%	30574	90%	**40	86%
Vihtavuori 3N37	<<locked>>	96%	29631	87%	**27	96%
Vihtavuori N310	<<locked>>	68%	29443	86%	**33	100%
Vihtavuori N320	<<locked>>	86%	30661	90%	**32	100%
Vihtavuori N32C Tin Star	<<locked>>	94%	18623	55%	**2	100%
Vihtavuori N330	<<locked>>	89%	29443	86%	**81	100%
Vihtavuori N340 👍	<<locked>>	93%	30197	89%	**88	100%
Vihtavuori N350	<<locked>>	97%	27601	81%	**91	95%
Winchester 231	<<locked>>	72%	28689	84%	**32	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	94%	19043	56%	**30	81%
ADI AP 70N	<<locked>>	61%	17332	51%	**8	100%
ADI APS 350	<<locked>>	60%	19377	57%	**6	100%
ADI APS 450	<<locked>>	62%	19102	56%	**9	100%
[ADI AS 30]²	<<locked>>	59%	15055	44%	**0	100%
ADI AS 50N	<<locked>>	62%	16795	49%	**8	100%
[Accurate No. 2]*	<<locked>>	60%	13764	40%	**3	88%
[Accurate No. 5]*	<<locked>>	61%	21219	62%	**83	86%
Accurate Solo 1000	<<locked>>	62%	16752	49%	**2	100%
Accurate Solo 1250	<<locked>>	60%	11966	35%	**3	96%
Alliant BULLSEYE	<<locked>>	60%	16244	48%	**5	95%
[Alliant POWER PISTOL]*	<<locked>>	80%	19769	58%	**86	81%
Alliant UNIQUE	<<locked>>	62%	11879	35%	**9	90%
Baschieri & Pellagri 100	<<locked>>	60%	13967	41%	**3	100%
Hodgdon Clays	<<locked>>	60%	19479	57%	**6	100%
Hodgdon HP38	<<locked>>	60%	25875	76%	**89	100%
[Hodgdon HS-6]*	<<locked>>	60%	16491	48%	**1	84%
[Hodgdon Longshot]*	<<locked>>	61%	18985	56%	**33	89%
Hodgdon Universal	<<locked>>	62%	14721	43%	**8	99%
Hodgdon TrailBoss	<<locked>>	86%	6657	20%	**9	98%
[Lovex D036]*	<<locked>>	61%	21190	62%	**79	86%
Lovex S011	<<locked>>	61%	20378	60%	**8	100%
Lovex S020	<<locked>>	62%	14185	42%	**9	95%
Maxam CSB 1	<<locked>>	61%	11414	33%	**3	95%
Maxam CSB 2	<<locked>>	62%	11052	32%	**3	99%
Maxam CSB 3	<<locked>>	60%	13097	38%	**6	99%
Maxam CSB 4	<<locked>>	61%	15098	44%	**9	100%
Maxam CSB 5	<<locked>>	60%	16897	50%	**6	100%
Ramshot Silhouette	<<locked>>	60%	16940	50%	**8	93%
Ramshot True Blue	<<locked>>	60%	19464	57%	**40	90%
Ramshot Zip	<<locked>>	60%	24656	72%	**76	100%
ReloadSwiss RS 12	<<locked>>	62%	15345	45%	**8	100%
ReloadSwiss RS 20	<<locked>>	62%	10747	32%	**6	90%
Rottweil P 801	<<locked>>	62%	18797	55%	**4	100%
[Rottweil P 806]*	<<locked>>	87%	13256	39%	**14	81%
[SNPE Vectan A0]*	<<locked>>	62%	12285	36%	**3	89%
SNPE Vectan BA 9	<<locked>>	60%	14359	42%	**3	96%
SNPE Vectan BA10	<<locked>>	61%	20856	61%	**9	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	71%	13097	38%	**9	81%
SNPE Vectan BA9 1/2	<<locked>>	61%	14069	41%	**6	97%
[Shooters World Auto Pistol]*	<<locked>>	61%	21190	62%	**79	86%
Somchem MP200	<<locked>>	61%	14272	42%	**5	91%
Somchem MS200	<<locked>>	61%	12995	38%	**3	92%
[Somchem S221]*	<<locked>>	74%	22872	67%	**22	81%
[Vihtavuori 3N37]*	<<locked>>	65%	11676	34%	**3	81%
Vihtavuori N310	<<locked>>	62%	24294	71%	**4	100%
Vihtavuori N320	<<locked>>	61%	14823	43%	**9	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	7673	23%	**2	100%
Vihtavuori N330	<<locked>>	61%	12357	36%	**9	98%
[Vihtavuori N340]*	<<locked>>	60%	11502	34%	**0	89%
[Vihtavuori N350]*	<<locked>>	67%	11385	33%	**6	80%
Winchester 231	<<locked>>	62%	21176	62%	**24	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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