According to Derek Peterson, president of Peterson Cartridge, "Lots of shooters still use .243 Winchester for long-distance and competition shooting. And many of these shooters want it in Small Rifle primer (SRP). But no one else makes it in SRP. Some shooters are even going to the trouble of...
Some people refer to it as the .280 Improved. Other people call it the .280 Ackley. On casings made by Peterson, they are headstamped .280 Ack Imp. Whichever way you refer to it, the concept popularized by gunsmith and wildcatter P.O. Ackley, is here to stay. Of all the many calibers Parker...