top of page

.455 MK II

We recommend xxlreloading.com for the most comprehensive .455 MK II load data, covering a wide range of powders and bullet brands or quickload.pro to calculate your individual load:

Caliber Description

Popular Load Recipes

- 265 grain lead RN bullet, 4.0 grains Bullseye powder, CCI large pistol primer, overall length 1.240 inch
- 265 grain lead RN bullet, 4.5 grains Unique powder, Winchester large pistol primer, overall length 1.245 inch
- 265 grain lead RN bullet, 4.0 grains Trail Boss powder, Federal large pistol primer, overall length 1.240 inch
- 265 grain lead RN bullet, 3.5 grains Red Dot powder, CCI large pistol primer, overall length 1.240 inch
- 250 grain lead RN bullet, 4.2 grains Bullseye powder, Federal large pistol primer, overall length 1.240 inch
- 262 grain lead RN bullet, 4.0 grains Unique powder, Winchester large pistol primer, overall length 1.240 inch
- 265 grain lead RN bullet, 3.8 grains Winchester 231 powder, CCI large pistol primer, overall length 1.245 inch
- 265 grain lead RN bullet, 4.1 grains Universal Clays powder, Federal large pistol primer, overall length 1.240 inch

Cost per Reloaded Round

Technical Specifications

Safety Standard / Application

C.I.P. / Revolver / Pistol Caliber

Most Suitable Bullet Weights

255 - 475 Grains

Case Capacity / Average Charge

19 Grains of Water / 4.5 Grains

Average Muzzle Velocity / Energy

741 fps / 287 ft-lbf

Case Length / Max. C.O.L

0.767'' / 1.26''

Similar Calibers

.45 Auto (ACP)

.45 Auto Rim

.45 Colt

.45 Glock Auto Pistol

.45 Win. Mag.

.450 Short

.454 Casull Magnum

.455 MK II

.460 Rowland

.460 S&W Magnum

.480 Ruger

.50 A.E.

.500 S&W Magnum

bottom of page