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Load data for 7.21 Firebird (Lazzeroni) + .284 | 168gr | Berger Classic Hybrid Hunter

Recommended Powder(s): ADI AR 2218, Alliant Reloder-33, Alliant Reloder-50, IMR 8133 Enduron, Vihtavuori N570

7.21 Firebird (Lazzeroni) + .284 | 168gr | Berger Classic Hybrid Hunter

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.284 | 168gr | Berger Classic Hybrid Hunter
Manufacturer SKU:
28570
Bullet Weight:
168gr | 10.9g
Bullet Diameter:
0.284" | 7.21mm
Bullet Length:
1.372" | 34.8mm
Caliber:
7.21 Firebird (Lazzeroni) load data
Case Length (l3):
2.800" | 71.1mm
Cartridge Length (C.O.L.):
3.497" | 88.8mm
Seated Depth:
0.675" | 17.2mm
Shank Seated Depth:
0.450" | 11.4mm
Case Capacity:
121.0 Grains of Water | 7.86 cm³
Primer Size:
Large Rifle Magnum (LRM)
Max. allowed Pressure:
66717 psi | 4600 bar
LID:
LID_B1031_C1103
Last updated:
2025-02-02
Recommended Twist Rate:
1:10 - 1:9

Load data for 68 loads in caliber 7.21 Firebird (Lazzeroni) with .284 | 168gr | Berger Classic Hybrid Hunter bullet and 34 powders such as ADI AR 2218, Alliant Reloder-33, Alliant Reloder-50, IMR 8133 Enduron, Vihtavuori N570. 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".

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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 AR 2213
<<locked>>
83%
59683
89%
**18
100%
ADI AR 2217
<<locked>>
91%
59959
90%
**05
100%
ADI AR 2218 👍
<<locked>>
94%
59741
90%
**30
100%
ADI AR 2225
<<locked>>
93%
59596
89%
**12
100%
Accurate 3100
<<locked>>
83%
59828
90%
**07
100%
Accurate 8700
<<locked>>
97%
52895
79%
**00
98%
Alliant Reloder-23
<<locked>>
84%
59727
90%
**20
100%
Alliant Reloder-25
<<locked>>
87%
59901
90%
**82
100%
Alliant Reloder-33 👍
<<locked>>
91%
59437
89%
**51
99%
Alliant Reloder-50 👍
<<locked>>
95%
59828
90%
**45
99%
[Hodgdon 50BMG]*
<<locked>>
97%
56231
84%
**66
92%
Hodgdon H1000
<<locked>>
91%
59959
90%
**05
100%
Hodgdon H4831
<<locked>>
86%
59770
90%
**69
100%
Hodgdon Retumbo
<<locked>>
93%
59596
89%
**12
100%
Hodgdon US 869
<<locked>>
97%
57319
86%
**63
95%
Hodgdon TrailBoss
<<locked>>
96%
36390
55%
**86
100%
IMR 4955 Enduron
<<locked>>
84%
59828
90%
**43
100%
IMR 7977 Enduron
<<locked>>
89%
59756
90%
**30
97%
IMR 8133 Enduron 👍
<<locked>>
95%
59857
90%
**28
100%
Lovex D100
<<locked>>
92%
59596
89%
**53
96%
Lovex S071
<<locked>>
88%
60031
90%
**04
100%
Norma 217
<<locked>>
95%
59756
90%
**15
100%
Ramshot LRT
<<locked>>
95%
59654
89%
**48
96%
ReloadSwiss RS 14
<<locked>>
97%
37826
57%
**39
100%
ReloadSwiss RS 76
<<locked>>
86%
59770
90%
**38
100%
ReloadSwiss RS 80
<<locked>>
89%
59509
89%
**35
100%
SNPE Vectan SP 13
<<locked>>
97%
54012
81%
**97
98%
Vihtavuori 20N29
<<locked>>
97%
52692
79%
**84
96%
Vihtavuori 24N41
<<locked>>
95%
60046
90%
**15
96%
Vihtavuori N165
<<locked>>
86%
59466
89%
**07
100%
Vihtavuori N170
<<locked>>
94%
59741
90%
**66
99%
Vihtavuori N565
<<locked>>
86%
59567
89%
**95
100%
Vihtavuori N568
<<locked>>
89%
59669
89%
**41
100%
Vihtavuori N570 👍
<<locked>>
90%
59553
89%
**74
99%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2213
<<locked>>
81%
55564
83%
**49
100%
ADI AR 2217
<<locked>>
81%
41930
63%
**90
99%
[ADI AR 2218]*
<<locked>>
81%
36158
54%
**25
93%
ADI AR 2225
<<locked>>
81%
39291
59%
**74
100%
Accurate 3100
<<locked>>
81%
55767
84%
**38
100%
[Accurate 8700]*
<<locked>>
84%
32256
48%
**51
90%
Alliant Reloder-23
<<locked>>
81%
54607
82%
**44
100%
Alliant Reloder-25
<<locked>>
81%
48660
73%
**08
100%
Alliant Reloder-33
<<locked>>
81%
40553
61%
**90
95%
[Alliant Reloder-50]*
<<locked>>
81%
35505
53%
**59
92%
[Hodgdon 50BMG]*
<<locked>>
94%
51837
78%
**84
90%
Hodgdon H1000
<<locked>>
81%
41930
63%
**90
99%
Hodgdon H4831
<<locked>>
81%
50850
76%
**18
100%
Hodgdon Retumbo
<<locked>>
81%
39291
59%
**74
100%
[Hodgdon US 869]*
<<locked>>
88%
42308
63%
**71
90%
Hodgdon TrailBoss
<<locked>>
81%
29211
44%
**29
100%
IMR 4955 Enduron
<<locked>>
81%
54288
81%
**64
100%
[IMR 7977 Enduron]*
<<locked>>
81%
46137
69%
**94
94%
IMR 8133 Enduron
<<locked>>
81%
36492
55%
**82
97%
[Lovex D100]*
<<locked>>
81%
40770
61%
**95
90%
Lovex S071
<<locked>>
81%
48080
72%
**20
100%
Norma 217
<<locked>>
81%
37391
56%
**12
99%
[Ramshot LRT]*
<<locked>>
85%
42540
64%
**30
90%
ReloadSwiss RS 14
<<locked>>
81%
30182
45%
**72
100%
ReloadSwiss RS 76
<<locked>>
81%
48631
73%
**74
100%
ReloadSwiss RS 80
<<locked>>
81%
44367
66%
**62
98%
[SNPE Vectan SP 13]*
<<locked>>
82%
32779
49%
**44
90%
[Vihtavuori 20N29]*
<<locked>>
87%
37144
56%
**69
90%
[Vihtavuori 24N41]*
<<locked>>
85%
42293
63%
**90
90%
Vihtavuori N165
<<locked>>
81%
51227
77%
**89
100%
[Vihtavuori N170]*
<<locked>>
81%
39581
59%
**79
93%
Vihtavuori N565
<<locked>>
81%
50270
75%
**48
100%
Vihtavuori N568
<<locked>>
81%
45049
68%
**79
98%
Vihtavuori N570
<<locked>>
81%
43497
65%
**66
96%

Start Load - Barrel Length: 23.60''

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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