Thread: Short fatties vs long slender ones...

My understanding is that there are four elements to the short fatty case design that improve accuracy. If you look at how winning benchrest cases have influenced modern cartridge design, then it’s probably fair to say that the long, tapered cartridge designs of yesteryear are done and dusted.

1. Sharp shoulder angle (more positive headspacing)
2. Very little taper (co-axial alignment to the bore)
3. Longer neck length (improved concentricity)
4. Short fat case (powder burn efficiency & uniformity)

Plus of course a lot of the short fat cases are able to shoot long for calibre, high BC bullets, with chamber dimensions allowing far longer extruding bullet length than what went before.