Black Rifles?

[FinRazr]

This may help.

[nautiduck]

Wil Shots a 7.62X39 which some reloaders use a .308 bullet, but my understanding is that it actually is .311. Marginal difference, but those that load with .308 suffer accuracy issues. Not sure if that holds true with the 7.62x51

Most russian ammo surplus does have a .310 - .311 bullet most of your .308 rifle will fire this without issue. Ruger even went a far as 1992-3 as to change the barrel in the mini 30s to .310 in the grooves to accomodate russian surplus ammo and contrary to rumor the barrel does not taper to .308. I found this that might be of interest to any 7.62 surplus shooters. 7.62 ammo generally produces pressures of 50,000 psi .308 win generates 62,000 psi read there is some surplus that is generating 110,000 psi in one out of twenty rounds please be careful and read below.

Companhia Brasileria de Cartuchos, CBC, says its 7.62mm x 51mm cartridges from lots dated 1975 pose serious safety risks because of excessive pressures. The cartridges, headstamped "CBC 7.62 75", should not be used, given away or sold under any circumstances. There have been reports of rifles bursting as a result of the excessive pressure. An independent testing lab detected peak pressures in excess of 130,000 CUP, in one of 20 of the cartridges it tested. CBC calls these rounds outdated.

The particular round was manufactured solely for military use in several countries. They are not intended for civilian use at all.

CBC also has issued a warning for any of its 7.62mm x 51mm cartridges from any year which have a label on the packing material with the Spanish word "reengastada." The label was not affixed by the manufacturer and its application to ammunition is unclear.

If you have any ammunition with the 1975 headstamp or with the Spanish word, contact CBC at 800-742-1094. (this number no longer works)

– Originally published by the author, un-bylined, in the 1 June 1992 Firearms Business.