Load data for .44 Rem. Mag. + .429 | 300gr | Barnes Buster

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.429 \| 300gr \| Barnes Buster
Manufacturer SKU:	30545
Bullet Weight:	300gr \| 19.4g
Bullet Diameter:	0.429" \| 10.90mm
Bullet Length:	<<locked>>
Caliber:	.44 Rem. Mag. load data
Case Length (l3):	1.275" \| 32.4mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
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_B785_C714
Last updated:	2026-01-20

Load data for 78 loads in caliber .44 Rem. Mag. with .429 | 300gr | Barnes Buster bullet and 39 powder(s). 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>>	96%	36245	89%	**66	100%
ADI AP 70N	<<locked>>	64%	34272	84%	**8	100%
Accurate No. 2	<<locked>>	73%	36129	89%	**1	100%
Accurate No. 7	<<locked>>	74%	34621	85%	**02	94%
[Accurate No. 9]*	<<locked>>	84%	35839	88%	**09	89%
Accurate TCM	<<locked>>	84%	36492	90%	**09	91%
[Alliant 2400]*	<<locked>>	95%	35331	87%	**25	86%
Alliant BLUE DOT	<<locked>>	97%	35940	89%	**06	94%
Alliant BULLSEYE	<<locked>>	67%	33605	83%	**1	100%
Alliant POWER PISTOL 👍	<<locked>>	78%	35592	88%	**99	100%
Alliant Sport Pistol	<<locked>>	64%	35186	87%	**01	100%
Alliant UNIQUE	<<locked>>	76%	33721	83%	**1	100%
Hodgdon HS-6	<<locked>>	65%	35911	88%	**43	100%
Hodgdon Universal	<<locked>>	71%	34272	84%	**8	100%
Hodgdon CFE Pistol	<<locked>>	75%	36448	90%	**5	100%
Lovex D037.1	<<locked>>	74%	34621	85%	**02	94%
[Lovex D037.2]*	<<locked>>	83%	35839	88%	**09	89%
Lovex S020	<<locked>>	69%	33881	83%	**5	100%
Maxam CSB 2	<<locked>>	78%	35592	88%	**2	100%
[Ramshot Enforcer]*	<<locked>>	95%	35317	87%	**35	88%
Ramshot Silhouette	<<locked>>	66%	36390	90%	**17	100%
ReloadSwiss RS 20	<<locked>>	79%	35157	87%	**7	100%
ReloadSwiss RS 24	<<locked>>	81%	36114	89%	**02	97%
Rottweil P 806	<<locked>>	85%	34200	84%	**02	100%
SNPE Vectan A0	<<locked>>	80%	34490	85%	**1	100%
SNPE Vectan BA7 1/2	<<locked>>	87%	36289	89%	**30	100%
SNPE Vectan BA9 1/2	<<locked>>	73%	34360	85%	**2	100%
SNPE Vectan SP 2 👍	<<locked>>	74%	36172	89%	**06	100%
[Shooters World Heavy Pistol]*	<<locked>>	83%	35839	88%	**09	89%
Shooters World Major Pistol	<<locked>>	74%	34621	85%	**02	94%
Somchem MP200	<<locked>>	72%	35592	88%	**01	100%
Somchem MS200	<<locked>>	75%	34490	85%	**1	100%
Somchem S221	<<locked>>	67%	34461	85%	**63	98%
Vihtavuori 3N37	<<locked>>	79%	35085	86%	**37	100%
Vihtavuori 3N38	<<locked>>	92%	35708	88%	**89	97%
Vihtavuori N105 👍	<<locked>>	96%	31372	77%	**89	99%
Vihtavuori N330	<<locked>>	73%	34940	86%	**1	100%
Vihtavuori N340	<<locked>>	76%	34287	84%	**1	100%
Vihtavuori N350	<<locked>>	83%	35462	87%	**33	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	81%	25599	63%	**2	98%
ADI AP 70N	<<locked>>	61%	31488	78%	**2	100%
Accurate No. 2	<<locked>>	67%	30066	74%	**8	100%
[Accurate No. 7]*	<<locked>>	61%	21466	53%	**8	87%
[Accurate No. 9]*	<<locked>>	71%	22800	56%	**5	82%
[Accurate TCM]*	<<locked>>	71%	23293	57%	**5	83%
[Alliant 2400]*	<<locked>>	84%	25933	64%	**01	81%
[Alliant BLUE DOT]*	<<locked>>	80%	22887	56%	**8	87%
Alliant BULLSEYE	<<locked>>	61%	28355	70%	**8	100%
Alliant POWER PISTOL	<<locked>>	63%	22785	56%	**2	96%
Alliant Sport Pistol	<<locked>>	61%	32663	80%	**4	100%
Alliant UNIQUE	<<locked>>	70%	28819	71%	**2	100%
Hodgdon HS-6	<<locked>>	61%	31169	77%	**7	100%
Hodgdon Universal	<<locked>>	68%	31488	78%	**2	100%
Hodgdon CFE Pistol	<<locked>>	72%	33924	84%	**2	100%
[Lovex D037.1]*	<<locked>>	61%	21466	53%	**8	87%
[Lovex D037.2]*	<<locked>>	70%	22800	56%	**5	82%
Lovex S020	<<locked>>	67%	30995	76%	**2	100%
Maxam CSB 2	<<locked>>	74%	32808	81%	**9	100%
[Ramshot Enforcer]*	<<locked>>	84%	23830	59%	**8	80%
Ramshot Silhouette	<<locked>>	61%	31502	78%	**1	100%
ReloadSwiss RS 20	<<locked>>	71%	27557	68%	**5	100%
ReloadSwiss RS 24	<<locked>>	66%	22249	55%	**5	90%
Rottweil P 806	<<locked>>	69%	20146	50%	**2	99%
SNPE Vectan A0	<<locked>>	77%	31836	78%	**5	100%
SNPE Vectan BA7 1/2	<<locked>>	74%	25628	63%	**9	100%
SNPE Vectan BA9 1/2	<<locked>>	70%	31763	78%	**9	100%
SNPE Vectan SP 2	<<locked>>	61%	22887	56%	**5	97%
[Shooters World Heavy Pistol]*	<<locked>>	70%	22800	56%	**5	82%
[Shooters World Major Pistol]*	<<locked>>	61%	21466	53%	**8	87%
Somchem MP200	<<locked>>	64%	28282	70%	**8	100%
Somchem MS200	<<locked>>	69%	29428	72%	**2	100%
Somchem S221	<<locked>>	61%	28369	70%	**7	96%
Vihtavuori 3N37	<<locked>>	69%	25991	64%	**8	100%
Vihtavuori 3N38	<<locked>>	77%	23380	58%	**5	92%
Vihtavuori N105	<<locked>>	81%	19957	49%	**8	94%
Vihtavuori N330	<<locked>>	70%	31850	78%	**8	100%
Vihtavuori N340	<<locked>>	70%	29066	72%	**2	100%
Vihtavuori N350	<<locked>>	72%	26034	64%	**5	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