Guns

Ruger M77 mark 2, with a Bushnell Firefly 2.5-10×40

.243win is based on a necked down .308win cartridge case. It was developed by winchester and introduced in 1955. It offers bullets from 55gr and V0 from over 1200m/s to 107gr bullets at about 900m/s. The heavy bullets need a quick twistrate though (faster than 1:10). My Ruger M77 has a twistrate of 1:9 and is well suited for heavy bullets, but tends to overstabilize lighter bullets.

Reloading data

Hunting Loads

Barnes:

Brass: Geco

Primer: CCI 200

Powder: Norma 204, 45.0gr (max is about 46gr)

Bullet: Barnes TTSX 80gr

COL: 2.720″ (COL is longer than standard)

Medium factory crimp with Lee FCD

V0= 960m/s

The barnes TTSX bullet need to be seated close til the rifling to give optimum precision, hence the long COL in my rifle.

Sierra:

Brass: Geco

Primer: CCI 200

Powder: Norma 204, 40.7gr

Bullet: Sierra SPBT 100gr

COL: 2.650″

Light factory crimp with Lee FCD

V0= 830m/s

 

All reloading data fits my guns only, if You use it, it is entirely Your responsibility!