Load data for .44 Rem. Mag. + .429 | 300gr | Speer Magnum SP

Recommended Powder(s): ADI AP 100, Alliant POWER PISTOL, Rottweil P 806, Somchem S221, Vihtavuori N105

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.429 \| 300gr \| Speer Magnum SP
Manufacturer SKU:	4463
Bullet Weight:	300gr \| 19.4g
Bullet Diameter:	0.429" \| 10.90mm
Bullet Length:	0.840" \| 21.3mm
Caliber:	.44 Rem. Mag. load data
Case Length (l3):	1.275" \| 32.4mm
Cartridge Length (C.O.L.):	1.586" \| 40.3mm
Seated Depth:	0.529" \| 13.4mm
Shank Seated Depth:	0.529" \| 13.4mm
Case Capacity:	39.5 Grains of Water \| 2.56 cm³
Primer Size:	Large Pistol Magnum (LPM)
Max. allowed Pressure:	40611 psi \| 2800 bar
LID:	LID_B6279_C714
Last updated:	2025-02-02

Load data for 104 loads in caliber .44 Rem. Mag. with .429 | 300gr | Speer Magnum SP bullet and 52 powders such as ADI AP 100, Alliant POWER PISTOL, Rottweil P 806, Somchem S221, Vihtavuori N105. 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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Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

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.

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>>	90%	35215	87%	**99	100%
ADI AP 70N	<<locked>>	63%	36201	89%	**7	100%
ADI AS 30	<<locked>>	71%	34476	85%	**2	100%
ADI AS 50N	<<locked>>	67%	34403	85%	**8	100%
[Accurate 4100]*	<<locked>>	93%	35302	87%	**58	85%
Accurate No. 2	<<locked>>	69%	34969	86%	**10	100%
Accurate No. 7	<<locked>>	71%	36172	89%	**68	96%
Accurate No. 9	<<locked>>	80%	35897	88%	**58	91%
Accurate Solo 1000	<<locked>>	70%	35041	86%	**8	100%
Accurate Solo 1250	<<locked>>	75%	35418	87%	**1	100%
Accurate TCM	<<locked>>	79%	35012	86%	**48	92%
[Alliant 2400]*	<<locked>>	91%	36506	90%	**88	89%
Alliant BULLSEYE	<<locked>>	66%	36013	89%	**40	100%
Alliant POWER PISTOL 👍	<<locked>>	75%	36463	90%	**45	100%
Alliant UNIQUE	<<locked>>	76%	36448	90%	**53	100%
Baschieri & Pellagri 100	<<locked>>	72%	36143	89%	**2	100%
Hodgdon Clays	<<locked>>	68%	34621	85%	**0	100%
[Hodgdon LilGun]*	<<locked>>	96%	27746	68%	**32	84%
Hodgdon Universal	<<locked>>	68%	34983	86%	**8	100%
Hodgdon TrailBoss	<<locked>>	96%	17303	43%	**9	100%
Lovex D037.1	<<locked>>	71%	36172	89%	**68	96%
Lovex D037.2	<<locked>>	78%	35056	86%	**55	91%
Lovex S020	<<locked>>	68%	35592	88%	**07	100%
Maxam CSB 1	<<locked>>	78%	35708	88%	**1	100%
Maxam CSB 2	<<locked>>	75%	36187	89%	**4	100%
Maxam CSB 3	<<locked>>	72%	34272	84%	**8	100%
Maxam CSB 4	<<locked>>	70%	35186	87%	**8	100%
Maxam CSB 5	<<locked>>	67%	35505	87%	**6	100%
[Ramshot Enforcer]*	<<locked>>	90%	34664	85%	**75	89%
ReloadSwiss RS 12	<<locked>>	63%	34301	84%	**5	100%
ReloadSwiss RS 14	<<locked>>	94%	15389	38%	**9	100%
ReloadSwiss RS 20	<<locked>>	75%	35070	86%	**33	100%
ReloadSwiss RS 24	<<locked>>	78%	36260	89%	**52	98%
Rottweil P 806 👍	<<locked>>	81%	35592	88%	**52	100%
SNPE Vectan A0	<<locked>>	76%	34214	84%	**7	100%
SNPE Vectan BA 9	<<locked>>	71%	35578	88%	**4	100%
SNPE Vectan BA10	<<locked>>	67%	35752	88%	**6	100%
SNPE Vectan BA7 1/2	<<locked>>	81%	34476	85%	**56	100%
SNPE Vectan BA9 1/2	<<locked>>	72%	35897	88%	**1	100%
Shooters World Heavy Pistol	<<locked>>	78%	35056	86%	**55	91%
Shooters World Major Pistol	<<locked>>	71%	36172	89%	**68	96%
Somchem MP200	<<locked>>	70%	36260	89%	**47	100%
Somchem MS200	<<locked>>	74%	35795	88%	**20	100%
Somchem S221 👍	<<locked>>	64%	35114	86%	**19	99%
Vihtavuori 3N37	<<locked>>	76%	36216	89%	**86	100%
Vihtavuori 3N38	<<locked>>	87%	35737	88%	**32	98%
Vihtavuori N105 👍	<<locked>>	93%	34563	85%	**58	100%
Vihtavuori N320	<<locked>>	69%	36303	89%	**1	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	36201	89%	**6	100%
Vihtavuori N330	<<locked>>	69%	34374	85%	**1	100%
Vihtavuori N340	<<locked>>	74%	35650	88%	**20	100%
Vihtavuori N350	<<locked>>	80%	36463	90%	**83	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	16012	39%	**0	93%
ADI AP 70N	<<locked>>	61%	33837	83%	**8	100%
ADI AS 30	<<locked>>	61%	27325	67%	**3	100%
ADI AS 50N	<<locked>>	61%	29588	73%	**2	100%
[Accurate 4100]*	<<locked>>	87%	28224	70%	**73	81%
Accurate No. 2	<<locked>>	61%	27398	67%	**8	100%
Accurate No. 7	<<locked>>	61%	24062	59%	**07	91%
[Accurate No. 9]*	<<locked>>	63%	19319	48%	**2	80%
Accurate Solo 1000	<<locked>>	61%	27934	69%	**3	100%
Accurate Solo 1250	<<locked>>	61%	24134	59%	**6	100%
[Accurate TCM]*	<<locked>>	61%	18666	46%	**2	81%
[Alliant 2400]*	<<locked>>	75%	22263	55%	**8	80%
Alliant BULLSEYE	<<locked>>	61%	31270	77%	**4	100%
Alliant POWER PISTOL	<<locked>>	61%	23206	57%	**1	97%
Alliant UNIQUE	<<locked>>	60%	23801	59%	**5	100%
Baschieri & Pellagri 100	<<locked>>	61%	26672	66%	**6	100%
Hodgdon Clays	<<locked>>	61%	29501	73%	**7	100%
[Hodgdon LilGun]*	<<locked>>	91%	23598	58%	**63	80%
Hodgdon Universal	<<locked>>	61%	28166	69%	**9	100%
Hodgdon TrailBoss	<<locked>>	86%	14504	36%	**6	100%
Lovex D037.1	<<locked>>	61%	24062	59%	**07	91%
[Lovex D037.2]*	<<locked>>	63%	19943	49%	**2	81%
Lovex S020	<<locked>>	61%	28442	70%	**8	100%
Maxam CSB 1	<<locked>>	62%	23003	57%	**0	100%
Maxam CSB 2	<<locked>>	61%	24947	61%	**3	100%
Maxam CSB 3	<<locked>>	60%	25338	62%	**6	100%
Maxam CSB 4	<<locked>>	62%	28036	69%	**9	100%
Maxam CSB 5	<<locked>>	61%	30472	75%	**6	100%
[Ramshot Enforcer]*	<<locked>>	75%	20798	51%	**1	80%
ReloadSwiss RS 12	<<locked>>	61%	31908	79%	**2	100%
ReloadSwiss RS 14	<<locked>>	84%	12850	32%	**3	100%
ReloadSwiss RS 20	<<locked>>	61%	22655	56%	**9	100%
ReloadSwiss RS 24	<<locked>>	61%	21190	52%	**5	91%
Rottweil P 806	<<locked>>	61%	17550	43%	**2	98%
SNPE Vectan A0	<<locked>>	61%	22466	55%	**6	100%
SNPE Vectan BA 9	<<locked>>	61%	27064	67%	**2	100%
SNPE Vectan BA10	<<locked>>	61%	30995	76%	**3	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	19377	48%	**3	99%
SNPE Vectan BA9 1/2	<<locked>>	62%	27151	67%	**6	100%
[Shooters World Heavy Pistol]*	<<locked>>	63%	19943	49%	**2	81%
Shooters World Major Pistol	<<locked>>	61%	24062	59%	**07	91%
Somchem MP200	<<locked>>	61%	27818	69%	**8	100%
Somchem MS200	<<locked>>	61%	25164	62%	**6	100%
Somchem S221	<<locked>>	61%	31328	77%	**76	98%
Vihtavuori 3N37	<<locked>>	61%	22756	56%	**2	100%
[Vihtavuori 3N38]*	<<locked>>	61%	15708	39%	**3	87%
[Vihtavuori N105]*	<<locked>>	61%	12227	30%	**1	86%
Vihtavuori N320	<<locked>>	61%	28558	70%	**3	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	17100	42%	**9	100%
Vihtavuori N330	<<locked>>	61%	27253	67%	**2	100%
Vihtavuori N340	<<locked>>	61%	24656	61%	**6	100%
Vihtavuori N350	<<locked>>	61%	20929	52%	**9	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.