Load data for 9 x 21 + .357 | 125gr | Sierra JSP FN

Recommended Powder(s): Alliant BULLSEYE, Lovex S020, Maxam CSB 2, Ramshot Silhouette, ReloadSwiss RS 20

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Sierra JSP FN
Manufacturer SKU:	8310
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.532" \| 13.5mm
Caliber:	9 x 21 load data
Case Length (l3):	0.830" \| 21.1mm
Cartridge Length (C.O.L.):	1.154" \| 29.3mm
Seated Depth:	0.208" \| 5.3mm
Shank Seated Depth:	0.208" \| 5.3mm
Case Capacity:	15.5 Grains of Water \| 1.01 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B5945_C1232
Last updated:	2025-01-01

Load data for 106 loads in caliber 9 x 21 with .357 | 125gr | Sierra JSP FN bullet and 53 powders such as Alliant BULLSEYE, Lovex S020, Maxam CSB 2, Ramshot Silhouette, ReloadSwiss RS 20. 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%	22176	65%	**22	85%
ADI AP 70N	<<locked>>	74%	29820	87%	**98	100%
ADI APS 350	<<locked>>	75%	30284	89%	**14	100%
ADI APS 450	<<locked>>	75%	28776	84%	**33	100%
ADI AS 30	<<locked>>	79%	28616	84%	**79	100%
ADI AS 50N	<<locked>>	79%	30153	88%	**45	100%
Accurate No. 2	<<locked>>	79%	28587	84%	**71	98%
Accurate No. 5	<<locked>>	67%	29080	85%	**47	92%
Accurate Solo 1000	<<locked>>	80%	29660	87%	**15	100%
Accurate Solo 1250	<<locked>>	88%	29486	87%	**75	100%
Alliant BULLSEYE 👍	<<locked>>	76%	29298	86%	**27	100%
Alliant POWER PISTOL	<<locked>>	91%	30647	90%	**16	90%
Alliant UNIQUE	<<locked>>	89%	29399	86%	**40	100%
Baschieri & Pellagri 100	<<locked>>	82%	29457	86%	**25	100%
Hodgdon Clays	<<locked>>	75%	30618	90%	**30	100%
Hodgdon HS-6	<<locked>>	73%	29602	87%	**43	94%
Hodgdon Longshot	<<locked>>	70%	29704	87%	**47	96%
Hodgdon Universal	<<locked>>	81%	29820	87%	**98	100%
Hodgdon TrailBoss	<<locked>>	92%	9776	29%	**8	100%
Lovex D036	<<locked>>	67%	29269	86%	**47	92%
Lovex S011	<<locked>>	70%	29443	86%	**38	100%
Lovex S020 👍	<<locked>>	80%	29080	85%	**01	100%
Maxam CSB 1	<<locked>>	91%	29515	87%	**68	100%
Maxam CSB 2 👍	<<locked>>	91%	30618	90%	**07	100%
Maxam CSB 3	<<locked>>	85%	29631	87%	**55	100%
Maxam CSB 4	<<locked>>	81%	29414	86%	**29	100%
Maxam CSB 5	<<locked>>	75%	29066	85%	**79	100%
Ramshot Silhouette 👍	<<locked>>	73%	29878	88%	**37	99%
Ramshot True Blue	<<locked>>	69%	30400	89%	**50	96%
Ramshot Zip	<<locked>>	62%	29791	87%	**68	100%
ReloadSwiss RS 12	<<locked>>	78%	30298	89%	**88	100%
ReloadSwiss RS 14	<<locked>>	95%	9282	27%	**4	98%
ReloadSwiss RS 20 👍	<<locked>>	93%	30023	88%	**60	100%
[ReloadSwiss RS 24]*	<<locked>>	93%	29863	88%	**76	82%
Rottweil P 801	<<locked>>	72%	30560	90%	**55	100%
Rottweil P 806	<<locked>>	96%	23482	69%	**70	93%
SNPE Vectan A0	<<locked>>	92%	30385	89%	**98	100%
SNPE Vectan BA 9	<<locked>>	83%	30501	89%	**81	100%
SNPE Vectan BA10	<<locked>>	70%	28761	84%	**33	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	28703	84%	**11	95%
SNPE Vectan BA9 1/2	<<locked>>	83%	29892	88%	**84	100%
Shooters World Auto Pistol	<<locked>>	67%	29269	86%	**47	92%
Somchem MP200	<<locked>>	82%	30168	89%	**34	100%
Somchem MS200	<<locked>>	85%	29182	86%	**01	100%
[Somchem S221]*	<<locked>>	78%	30603	90%	**70	87%
Vihtavuori 3N37	<<locked>>	91%	29617	87%	**63	97%
Vihtavuori N310	<<locked>>	65%	29501	87%	**53	100%
Vihtavuori N320	<<locked>>	81%	29892	88%	**48	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	22582	66%	**4	100%
Vihtavuori N330	<<locked>>	83%	28747	84%	**94	100%
Vihtavuori N340	<<locked>>	86%	29153	86%	**04	100%
Vihtavuori N350	<<locked>>	94%	29428	86%	**47	97%
Winchester 231	<<locked>>	69%	29791	87%	**68	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	85%	17738	52%	**24	81%
ADI AP 70N	<<locked>>	62%	21509	63%	**73	100%
ADI APS 350	<<locked>>	62%	21843	64%	**9	100%
ADI APS 450	<<locked>>	60%	19435	57%	**2	100%
ADI AS 30	<<locked>>	60%	17854	52%	**9	100%
ADI AS 50N	<<locked>>	62%	19580	57%	**8	100%
Accurate No. 2	<<locked>>	62%	16752	49%	**1	92%
[Accurate No. 5]*	<<locked>>	62%	24685	72%	**71	89%
Accurate Solo 1000	<<locked>>	62%	18855	55%	**8	100%
Accurate Solo 1250	<<locked>>	60%	14025	41%	**6	98%
Alliant BULLSEYE	<<locked>>	62%	19624	58%	**53	98%
[Alliant POWER PISTOL]*	<<locked>>	72%	18478	54%	**73	80%
Alliant UNIQUE	<<locked>>	61%	14185	42%	**8	93%
Baschieri & Pellagri 100	<<locked>>	60%	16230	48%	**2	100%
Hodgdon Clays	<<locked>>	62%	22089	65%	**2	100%
[Hodgdon HS-6]*	<<locked>>	61%	19928	58%	**70	88%
Hodgdon Longshot	<<locked>>	62%	22336	66%	**25	92%
Hodgdon Universal	<<locked>>	61%	17216	51%	**1	100%
Hodgdon TrailBoss	<<locked>>	78%	7585	22%	**9	99%
[Lovex D036]*	<<locked>>	62%	24656	72%	**68	89%
Lovex S011	<<locked>>	60%	22075	65%	**37	100%
Lovex S020	<<locked>>	61%	16273	48%	**8	97%
Maxam CSB 1	<<locked>>	61%	13561	40%	**9	98%
Maxam CSB 2	<<locked>>	62%	13837	41%	**5	100%
Maxam CSB 3	<<locked>>	60%	15403	45%	**9	100%
Maxam CSB 4	<<locked>>	61%	17361	51%	**8	100%
Maxam CSB 5	<<locked>>	60%	19595	57%	**8	100%
Ramshot Silhouette	<<locked>>	60%	19682	58%	**60	95%
Ramshot True Blue	<<locked>>	61%	23192	68%	**29	93%
Ramshot Zip	<<locked>>	60%	27978	82%	**45	100%
ReloadSwiss RS 12	<<locked>>	61%	18144	53%	**14	100%
ReloadSwiss RS 14	<<locked>>	76%	6788	20%	**9	94%
ReloadSwiss RS 20	<<locked>>	61%	12430	36%	**2	93%
[ReloadSwiss RS 24]*	<<locked>>	89%	26803	79%	**27	80%
Rottweil P 801	<<locked>>	61%	21640	63%	**37	100%
[Rottweil P 806]*	<<locked>>	77%	12589	37%	**01	80%
SNPE Vectan A0	<<locked>>	61%	13996	41%	**2	92%
SNPE Vectan BA 9	<<locked>>	61%	17143	50%	**5	98%
SNPE Vectan BA10	<<locked>>	61%	22785	67%	**8	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	65%	12734	37%	**9	81%
SNPE Vectan BA9 1/2	<<locked>>	61%	16215	48%	**8	99%
[Shooters World Auto Pistol]*	<<locked>>	62%	24656	72%	**68	89%
Somchem MP200	<<locked>>	60%	16157	47%	**8	93%
Somchem MS200	<<locked>>	60%	15185	45%	**5	95%
[Somchem S221]*	<<locked>>	69%	22379	66%	**35	81%
[Vihtavuori 3N37]*	<<locked>>	61%	12459	37%	**6	82%
Vihtavuori N310	<<locked>>	62%	27354	80%	**27	100%
Vihtavuori N320	<<locked>>	61%	17289	51%	**8	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	10298	30%	**1	100%
Vihtavuori N330	<<locked>>	60%	14620	43%	**5	99%
Vihtavuori N340	<<locked>>	62%	14518	43%	**2	94%
[Vihtavuori N350]*	<<locked>>	61%	11182	33%	**6	80%
Winchester 231	<<locked>>	61%	23018	68%	**73	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