Based on our bullet sales over the past years, the following rifle calibers are the most popular amongst plains game hunters.
A little bit of history and a few important specifications for the reloader are given on each caliber.

Should your caliber do not appear on these pages, please contact us and we will make an attempt to get the relevant information and add it to this list of calbers.

.222 Remington
Type Rifle
Place of origin USA
Production history
Designer Mike Walker
Designed 1950
Manufacturer Remington
Specifications
Case type Rimless, bottleneck
Bullet diameter .224 in (5.7 mm)
Neck diameter .253 in (6.4 mm)
Shoulder diameter .357 in (9.1 mm)
Base diameter .376 in (9.6 mm)
Rim diameter .378 in (9.6 mm)
Case length 1.700 in (43.2 mm)

.220 Swift
Type Rifle
Place of origin USA
Production history
Designer Winchester
Designed 1935
Manufacturer Winchester
Specifications
Case type Parent case - 6mm Lee Navy
Bullet diameter .224 in (5.7 mm)
Neck diameter .260 in (6.6 mm)
Shoulder diameter .402 in (10.2 mm)
Base diameter .445 in (11.3 mm)
Rim diameter .473 in (12.0 mm)
Case length 2.205 in (56.0 mm)

.22-250 Remington
Type Rifle
Place of origin USA
Production history
Designer Grosvenor Wotkyns, J.E Gebby & J.E. Smith
Designed 1937
Manufacturer Remington
Specifications
Case type Parent case -.250-3000 Savage
Bullet diameter .224 in (5.7 mm)
Neck diameter .254 in (6.5 mm)
Shoulder diameter .414 in (10.5 mm)
Base diameter .469 in (11.9 mm)
Rim diameter .473 in (12.0 mm)
Case length 1.912 in (48.6 mm)

.223 Remington
Type Rifle/varmint
Place of origin USA
Production history
Designer Remington Arms
Designed 1964
Manufacturer Remington
Specifications
Case type - Rimless, bottleneck Parent case -.222 Remington Magnum
Bullet diameter .224 in (5.7 mm)
Neck diameter .253 in (6.4 mm)
Shoulder diameter .354 in (9.0 mm)
Base diameter .376 in (9.6 mm)
Rim thickness .045 in (1.1 mm)
Case length 1.76 in (45 mm)

.243 Winchester
Type Rifle
Place of origin USA
Production history
Designer Winchester
Produced 1955
Manufacturer Winchester
Specifications
Case type Parent case - .308
Bullet diameter .243 in (6.2 mm)
Neck diameter .276 in (7.0 mm)
Shoulder diameter .454 in (11.5 mm)
Base diameter .471 in (12.0 mm)
Rim diameter .473 in (12.0 mm)
Case length 2.045 in (51.9 mm)

25-06 Remington
Type Rifle/Varmint
Place of origin USA
Production history
Designer A.O.Niedner - 1920 as wildcat
Produced 1969
Manufacturer Remington
Specifications
Case type Parent case - 30-06 necked down to .257
Bore Groove Diameter .257"
Neck diameter -
Shoulder diameter -
Base diameter -
Rim diameter -
Max Case Length - 2.494" Trimmed - 2.484"

.264 Winchester Magnum
Type Rifle
Place of origin USA
Production history
Designer Winchester
Designed 1959
Manufacturer Winchester
Specifications
Case type -
Bullet diameter .264 in (6.7 mm)
Neck diameter .299 in (7.6 mm)
Shoulder diameter .491 in (12.5 mm)
Base diameter .515 in (13.1 mm)
Rim diameter .532 in (13.5 mm)
Case length 2.5 in (64 mm)

6.5x55mm (Swedish)
Type Military Rifle
Place of origin Norway / Sweden
Production history
Designed 1891
Produced 1894
Manufacturer Norway/Sweden
Specifications
Case type -
Bullet diameter 6.71 mm (0.264 in)
Neck diameter 7.60 mm (0.299 in)
Shoulder diameter 11.04 mm (0.435 in)
Base diameter 12.20 mm (0.480 in)
Rim diameter 12.20 mm (0.480 in)
Rim thickness 1.50 mm (0.059 in)
Case length 55.00 mm (2.165 in)

.270 Winchester
Type Rifle / Hunting
Place of origin USA
Production history
Designer Winchester
Designed 1923
Manufacturer Winchester
Specifications
Parent case .30-06
Bullet diameter .277 in (7.0 mm)
Neck diameter .308 in (7.8 mm)
Shoulder diameter .441 in (11.2 mm)
Base diameter .470 in (11.9 mm)
Rim diameter .473 in (12.0 mm)
Case length 2.540 in (64.5 mm)

7 mm Remington Magnum
Type Rifle
Place of origin USA
Production history
Designer Remington Arms Company
Designed 1962
Manufacturer Remington
Specifications
Parent case .375 Holland & Holland Magnum
Bullet diameter .284 in (7.2 mm)
Neck diameter .315 in (8.0 mm)
Shoulder diameter .491 in (12.5 mm)
Base diameter .512 in (13.0 mm)
Rim diameter .532 in (13.5 mm)
Case length 2.5 in (64 mm)

7x57mm
Type Rifle
Place of origin Germany
Production history
Designer Mauser
Designed 1893
Variants 7x57mm R (rimmed)
Specifications
Case type Rimless, bottleneck
Bullet diameter 7.24 mm (0.285 in)
Neck diameter 8.25 mm (0.325 in)
Shoulder diameter 10.92 mm (0.430 in)
Base diameter 12.01 mm (0.473 in)
Rim diameter 12.10 mm (0.476 in)
Rim thickness 1.15 mm (0.045 in)
Case length 57.00 mm (2.244 in)

.308 Winchester
Type Rifle
Place of origin USA
Production history
Designer Originally military rifle
Designed 1952
Manufacturer Winchester
Specifications
Case type Rimless, Bottleneck
Parent case .300 Savage
Bullet diameter .308 in (7.8 mm)
Neck diameter .3433 in (8.72 mm)
Shoulder diameter .4539 in (11.53 mm)
Base diameter .4709 in (11.96 mm)
Rim diameter .4728 in (12.01 mm)
Rim thickness .0539 in (1.37 mm)
Case length 2.015 (51.18 mm)

.30-06 Springfield
Type Rifle
Place of origin USA
Production history
Designer United States Military
Designed 1906
Produced 1906
Specifications
Case type Rimless, bottleneck
Parent case .30-03
Bullet diameter .308 in (7.8 mm)
Neck diameter 8.63 mm (0.340 in)
Shoulder diameter 11.20 mm (0.441 in)
Base diameter 11.96 mm (0.471 in)
Rim diameter 12.01 mm (0.473 in)
Rim thickness 1.24 mm (0.049 in)
Case length 63.35 mm (2.494 in)

.300 Winchester Magnum
Type Rifle / Large game
Place of origin USA
Production history
Designer Winchester Repeating Arms Company
Designed 1963
Specifications
Case type Belted, bottleneck
Parent case .375 H&H Magnum
Bullet diameter .308 in (7.8 mm)
Neck diameter .339 in (8.6 mm)
Shoulder diameter .489 in (12.4 mm)
Base diameter .513 in (13.0 mm)
Rim diameter .532 in (13.5 mm)
Rim thickness .049 in (1.2 mm)
Case length 2.62 in (67 mm)

.303 British
Type Rifle
Place of origin United Kingdom
Specifications
Case type Rimmed, bottleneck
Parent case None
Bullet diameter 0.311 in (7.9 mm)
Neck diameter 0.338 in (8.6 mm)
Shoulder diameter 0.401 in (10.2 mm)
Base diameter 0.460 in (11.7 mm)
Rim diameter 0.540 in (13.7 mm)
Rim thickness .064 in (1.6 mm)
Case length 2.222 in (56.4 mm)

.338 Winchester Magnum
Type Rifle
Place of origin USA
Production history
Manufacturer Winchester
Produced 1958
Specifications
Case type Belted, bottleneck
Parent case .375 H&H Magnum
Bullet diameter .338 in (8.58 mm)
Neck diameter .369 in (9.4 mm)
Shoulder diameter .491 in (12.5 mm)
Base diameter .513 in (13.0 mm)
Rim diameter .532 in (13.5 mm)
Case length 2.50 in (64 mm)

.338 Lapua Magnum
Type Rifle
Place of origin Finland
Production history
Designer Lapua
Designed 1989
Specifications
Case type Rimless, bottleneck
Parent case .416 Rigby, .338/416
Bullet diameter 8.58 mm (0.338 in)
Neck diameter 9.46 mm (0.372 in)
Shoulder diameter 13.82 mm (0.544 in)
Base diameter 14.91 mm (0.587 in)
Rim diameter 14.93 mm (0.588 in)
Rim thickness 1.52 mm (0.060 in)
Case length 69.20 mm (2.724 in)

9.3 x 62mm
Type Rifle
Place of origin Germany
Production history
Designer Otto Bock
Designed 1905
Specifications
Case type Rimless, bottleneck
Bullet diameter 9.3 mm (0.366 in)
Neck diameter 9.9 mm (0.39 in)
Shoulder diameter 11.4 mm (0.45 in)
Base diameter 12.1 mm (0.48 in)
Rim diameter 11.9 mm (0.47 in)
Rim thickness 1.3 mm (0.051 in)
Case length 62.0 mm (2.44 in)

.375 H&H Magnum
Type Rifle
Place of origin United Kingdom
Production history
Designer Holland & Holland
Designed 1912
Specifications
Case type Belted
Bullet diameter .375 in (9.5 mm)
Neck diameter .404 in (10.3 mm)
Shoulder diameter .448 in (11.4 mm)
Base diameter .513 in (13.0 mm)
Rim diameter .532 in (13.5 mm)
Rim thickness .220 in (5.6 mm)
Case length 2.850 in (72.4 mm)