| 4seventy |
| (Sponsor) |
| 09/09/08 03:25 PM |
Re: Barnes bullets in a Double --as per Barnes Newsletter-??
|
Quote:
This OSR (what to the inits stand for?)
Paul,
OSR stands for "Over Stressed Rifling", a condition where the rifling is said to be visible on the outside barrel surface, and supposedly due to bullets made from certain "harder" materials having been used.
Lots of stories floating around about this happening, but very little evidence to support them.
