.22LR Ammo Evaluation - Sterling Cross

Tom Opgenorth
Over the past couple of years there has been a surge of interest in .22 Rimfire in Canada (at least from my perspective). Arguably, it could be traced to the start of Project Mapleseed back in 2017, which then spawned the Canadian Rimfire Precision Series in 2018, and now this year the Outlaw Rimfire Precision Series. My friends south of the border have Project Appleseed and the National Rimfire League. As you can see, plenty of opportunity to participate/compete with the humble .

Ballistics of the Norinco 7.62x51

Tom Opgenorth
After an amateur attempt at trying to calculate the BC of the Norinco 7.62x39mm ammunition, I thought I would do the same thing with Norinco’s 7.62x51mm ammo. As one would expect, this stuff is fairly inexpensive as well, running aroun $0.50/round. I don’t think this is “precision ammo”, but it works well enough in my rifle. First off, I pulled one bullet apart, and weight it. The projecticle itself weight 146.

Ballistics of the Norinco 7.62x39

Tom Opgenorth
On of the great things about 7.62x39mm rifles (like the SKS) is that (for the time being) ammo is fairly inexpensive. A fellow who keeps his eye open for a deal can find 7.62x39mm in the range of $0.16CAD (for corrosive) to $0.30CAD (for non-corrosive) ammo. Of course being surplus ammo, finding ballistics data on this ammunition can be a bit of a trick. Granted, the 7.62x39 cartridge isn’t exactly a “precision” round, but intellectual curiousity had me wondering what the ballistic coefficient (BC) of this Norinco ammo was.