Thread: Trying something, Eric Cortina method of load development

Just spent a few interesting hours in the shed. I'm working with a long action Ruger M77, Shilen barrel in 7 x 57. @dannyb I see your seating depths and jam depth, in a .270. I used both the jam method and @mickyducks old school method. The curious thing, bearing in mind my calibre, with a Nosler BT 150, old school 3.188 held on lands. Jam approx 60 thou more. Tried several different brands, all had similar results. Example Rem coreloct @ 3.100 old school. I'm thinking I must have heaps of freebore, especially when I see your .270 seating depths. The good thing, though, long action magazine. Even jam measured Nosler, above, fits in mag well. Cartridge has a long neck which is going to help too. Don't know if I can manage seating adjustments in increments of 3 thou though.