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Highest Rifle Velocity
5278 fps in .22-243 Middl.
5130 fps in .22-250 Ack Im

Most Powerfull Rifle
14412 ft-lbs in .700 NE
13109 ft-lbs in .50 BMG


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.243 WSSM

Introduced in 2003, the 243 WSSM (Winchester Super Short Magnum) was a joint engineering/marketing plan by Winchester/Olin (Ammuniton), U.S. Repeating Arms Company (Winchester rifles and shotguns licensee), and the Browning Company. The cartridge is shorter and fatter than its counterparts and therefore performs with greater speed and better ballistics. The increased speed is achieved by putting a lightweight bullet on top of a short, fat, high-volume case. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

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There is no printed reloading manual created for this caliber. There will be created a Wire-O booklet of all calibers with at least 60 loads present.
Click here to see in which calibers this reloading manual is available.


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With a subscription you can download all loads in .243 WSSM as a PDF load manual. On top of that you will also get unlimited access to downloadable PDF manuals in several hudred calibers.


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reloadersnest Complete Reloading Manual
The Complete Reloading Manual is a compilation based on all rifle calibers with at least one load from this site.
The book contains 311 calibers and 9557 loads. 549 pages in 8x5 inch Perfect-Bound binding.
Click here to read more.

Show all 85 loads

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Bullet weight: Bullet name: Powder:  

Not yet verified user loads  
ID: Bullet weight: Bullet name: Powder:  
85 grs
Sierra HPBT
IMR 4064
105 grs
Hornady A Max
reloarder 19
55 grs
Sierra Blitzking
95 grs
Nosler Ballistic tip
Winchester 760
70 grs
Nosler Ballistic tip
Winchester 760
100 grs
Hornady BTSP
H 414
100 grs
Sierra BT
Mag Pro
65 grs
Hornady V-Max
Hodgedon 4895
75 grs
Hornady Vmax
85 grs
Sierra Game King
85 grs
Sierra Game King
62 grs
Barnes Varmint Grenade
Ramshot Hunter
80 grs
Barnes TTSX
70 grs
Sierra Match King
Alliant RL-19
100 grs
Nosler Partition
Alliant RL-19
95 grs
Hornady SST
Reloader 19
70 grs
Nosler b
Hogdon h 380
95 grs
Nosler BT Hunting
87 grs
.243 WSSM
IMR 4350
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