Thread: 260 Rem Neck up or Down

Originally Posted by Kiwi Greg

& down to 260 will make it even worse.

Not to mention Military cases are big & strong, they have limited internal capacity so pressures can get pretty high & if a slower powder is used it probably won't fit in....

Yep case capacity is diminished, I got about 52.5 grains capacity compared to a 260 case that typically ran 55.5. electing to use a faster powder (2208) and light projectiles ( 120 Grain ) meant it all stayed within safe parameters. The case length was ok as these were fired cases from 308 and as a now newly made 260 case were within tolerances. If that makes sense