Database Updates | CaliberAtlas

Dated corrections to published cartridge records, with the previous value, the replacement and the supporting reference.

This history begins with selected published corrections from September 2026. It is not a complete record of earlier edits or a certification of every field. Dimensions describe the cited cartridge standard or reference; individual loaded rounds can differ.

September 10, 2026

Five factory-load descriptions corrected

Corrected projectile construction on five loads and the Nosler Whitetail Country product-family name. These six description fields were checked against the linked manufacturer references.

.22-250 Rem. · Winchester 38 gr Varmint-X Lead Free 38 gr
Projectile construction
Before
Zinc-core lead-free polymer tip (rapid expansion)
After
Zinc-core lead-free hollow point (rapid expansion)
Winchester Varmint X Lead Free 22-250 Remington 38 grain
.300 Win. Mag. · Norma 180 gr Odin 180gr
Projectile construction
Before
Bonded polymer-tip boat-tail
After
Monolithic copper polymer-tip boat-tail (NAFT-coated, lead-free)
Norma Odin 300 Win Mag 180 grain
.45-70 · Nosler 300 gr Whitetail Country Straight-Wall
Product-family name
Before
Whitetail Country Solid Base
After
Whitetail Country Straight-Wall
Nosler Whitetail Country Straight-Wall 45-70 Government 300 grain
.45-70 · Nosler 300 gr Whitetail Country Straight-Wall
Projectile construction
Before
Solid Base tipped/straight-wall FN (polymer-tipped, expanding)
After
Straight-Wall jacketed soft point (truncated lead nose)
Nosler Whitetail Country Straight-Wall 45-70 Government 300 grain
6.5 Creedmoor · Federal 135 gr Berger Hybrid Hunter
Projectile construction
Before
Berger Hybrid (polymer-tip hunting)
After
Berger Hybrid jacketed open-tip hunting bullet
Federal Berger Hybrid Hunter 6.5 Creedmoor 135 grain
.223 Rem. · Sig Sauer 60 gr Elite Copper Hunting HT
Projectile construction
Before
Solid copper tipped (lead-free)
After
Solid copper hollow point (lead-free)
SIG SAUER SIG HT 223 Remington 60 grain

September 9, 2026

Reference dimensions corrected in 58 cartridge records

Updated case and overall lengths against C.I.P., SAAMI, Sierra and US Army references. Each entry names the source and the meaning of the measurement. Reference maxima are not measurements of every factory load.

.17 Rem.
Reference case length
Before
44.8 mm
After
45.62 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.218 Bee
Reference case length
Before
34.8 mm
After
34.16 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.219 Zipper
Reference overall length
Before
56.4 mm
After
57.4 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.22-250 Rem.
Reference overall length
Before
63.5 mm
After
59.69 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.22 Hornet
Reference overall length
Before
46.7 mm
After
43.76 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.22 K-Hornet
Reference overall length
Before
46.7 mm
After
44.45 mm
Sierra cartridge drawing · First PDF page; drawing maximum overall length 1.750 in, converted with exactly 25.4 mm/in.
.220 Swift
Reference overall length
Before
69.9 mm
After
68.07 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.222 Rem.
Reference overall length
Before
55.9 mm
After
54.1 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.222 Rem. Mag.
Reference overall length
Before
55.9 mm
After
57.91 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.223 WSSM
Reference overall length
Before
58 mm
After
59.94 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.224 Wby.
Reference case length
Before
43.2 mm
After
48.84 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.240 Apex
Reference overall length
Before
81.53 mm
After
82.55 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.240 Wby. Mag.
Reference overall length
Before
82.6 mm
After
78.74 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.244 H&H Mag.
Reference case length
Before
63.5 mm
After
70.87 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.244 H&H Mag.
Reference overall length
Before
86.4 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.25-06 Rem.
Reference overall length
Before
84.8 mm
After
82.55 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.257 Rob. Imp.
Reference overall length
Before
74.9 mm
After
70.485 mm
Sierra cartridge drawing · First PDF page; drawing maximum overall length 2.775 in, converted with exactly 25.4 mm/in.
.257 Wby. Mag.
Reference case length
Before
63.5 mm
After
64.74 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.257 Wby. Mag.
Reference overall length
Before
82.6 mm
After
81.51 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.270 Wby. Mag.
Reference overall length
Before
82.6 mm
After
83.69 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.275 H&H Mag.
Reference overall length
Before
83.3 mm
After
87.12 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.30-378 Wby. Mag.
Reference overall length
Before
94 mm
After
95.25 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.300 Sav.
Reference overall length
Before
63.5 mm
After
66.04 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.300 Ultra Mag
Reference overall length
Before
95 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.307 Win.
Reference case length
Before
51.8 mm
After
51.18 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.338 Ultra Mag
Reference case length
Before
72 mm
After
70.11 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.338 Ultra Mag
Reference overall length
Before
95 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.340 Wby. Mag.
Reference overall length
Before
91.4 mm
After
93.35 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.348 Win.
Reference case length
Before
56 mm
After
57.28 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.35 Rem.
Reference overall length
Before
63.5 mm
After
64.14 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.356 Win.
Reference case length
Before
51.8 mm
After
51.18 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.358 Norma Mag.
Reference overall length
Before
83.8 mm
After
85 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.375 Ultra Mag
Reference overall length
Before
95 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.375 Wby. Mag.
Reference overall length
Before
92.7 mm
After
90.5 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.378 Wby. Mag.
Reference overall length
Before
95.3 mm
After
92.84 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.404 Jeffery
Reference overall length
Before
95.3 mm
After
89.66 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.405 Win.
Reference case length
Before
65 mm
After
65.61 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.405 Win.
Reference overall length
Before
83.8 mm
After
80.64 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.45-70
Reference overall length
Before
68.6 mm
After
64.77 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.45 Win. Mag.
Reference overall length
Before
32.5 mm
After
40.01 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.450 Bushmaster
Reference case length
Before
42.19 mm
After
43.18 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.450 Marlin
Reference overall length
Before
67.6 mm
After
64.76 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.454 Casull
Reference overall length
Before
43 mm
After
44.83 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.458 Lott
Reference case length
Before
63.5 mm
After
71.12 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
.458 Lott
Reference overall length
Before
89.4 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.470 N.E.
Reference overall length
Before
109.5 mm
After
101.09 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
.475 Linebaugh
Reference case length
Before
36.6 mm
After
35.56 mm
SAAMI 475 Linebaugh drawing · Physical page 64, printed page 55; revised 2021-07-14. Case 1.400 in (35.56 mm); OAL 1.765 in (44.83 mm) maximum.
.475 Linebaugh
Reference overall length
Before
43.7 mm
After
44.83 mm
SAAMI 475 Linebaugh drawing · Physical page 64, printed page 55; revised 2021-07-14. Case 1.400 in (35.56 mm); OAL 1.765 in (44.83 mm) maximum.
.50 S&W Mag.
Reference overall length
Before
50.6 mm
After
58.42 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
5.45x39mm
Reference overall length
Before
56 mm
After
57 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
5.56×45mm NATO
Reference overall length
Before
58 mm
After
57.4 mm
US Army TM 43-0001-27, M193 and M855 · Physical pages 168 (M193) and 184 (M855); both cartridge-length rows state 2.26 in / 57.4 mm.
6.5 PRC
Reference overall length
Before
73.5 mm
After
75.06 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
6.5mm Rem. Mag.
Reference case length
Before
51.8 mm
After
55.12 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
6.5x54
Reference case length
Before
53 mm
After
53.65 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
6.5x54
Reference overall length
Before
76 mm
After
77.8 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
6.5x65 RWS
Reference overall length
Before
87 mm
After
85 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
6.5x68 S
Reference overall length
Before
91 mm
After
86.5 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
7mm STW
Reference overall length
Before
95 mm
After
92.71 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
7mm Ultra Mag
Reference overall length
Before
95 mm
After
91.44 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
7mm Wby. Mag.
Reference overall length
Before
82.6 mm
After
85.34 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
7x64
Reference overall length
Before
84.8 mm
After
84 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
7x65R
Reference overall length
Before
85 mm
After
83.6 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
8x56 M-S
Reference overall length
Before
79.5 mm
After
77.8 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
8x68S
Reference overall length
Before
93 mm
After
87 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)
9.3x74R
Reference case length
Before
74 mm
After
74.7 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L3 (case length)
9.3x74R
Reference overall length
Before
94.5 mm
After
96.5 mm
C.I.P. cartridge dimensions · Cartridge MAXI column; L6 (overall length)

September 5, 2026

Eleven reference dimensions corrected across seven cartridges

Corrected case and overall lengths using SAAMI drawings and a Hornady reference for .219 Zipper. Later corrections, where applicable, appear above; the record page shows the current published value.

.308 Marlin
Reference case length
Before
63 mm
After
48.77 mm
SAAMI centerfire rifle cartridge drawings · PDF page 129
.308 Marlin
Reference overall length
Before
85 mm
After
66.04 mm
SAAMI centerfire rifle cartridge drawings · PDF page 129
.338 Marlin Express
Reference case length
Before
55.8 mm
After
48.01 mm
SAAMI centerfire rifle cartridge drawings · PDF page 137
.338 Marlin Express
Reference overall length
Before
68.6 mm
After
66.04 mm
SAAMI centerfire rifle cartridge drawings · PDF page 137
.350 Legend
Reference case length
Before
36.5 mm
After
43.43 mm
SAAMI centerfire rifle cartridge drawings · PDF page 147
.376 Steyr
Reference case length
Before
55.5 mm
After
60 mm
SAAMI centerfire rifle cartridge drawings · PDF page 156
.376 Steyr
Reference overall length
Before
76 mm
After
79 mm
SAAMI centerfire rifle cartridge drawings · PDF page 156
.223 WSSM
Reference case length
Before
45 mm
After
42.42 mm
SAAMI centerfire rifle cartridge drawings · PDF page 85
.223 Rem.
Reference case length
Before
45 mm
After
44.7 mm
SAAMI centerfire rifle cartridge drawings · PDF page 84
.223 Rem.
Reference overall length
Before
58 mm
After
57.4 mm
SAAMI centerfire rifle cartridge drawings · PDF page 84
.219 Zipper
Reference case length
Before
43.9 mm
After
49.23 mm
Hornady .219 Zipper reference drawing · PDF page 1