Obturation
Member
Hey all,
I'm having some trouble here, I'm not an experienced bottlenecked cartridge reloader- I pretty much stick to straight walled cartridges. I have loaded for my 30-30 before and I could easily repeat the loading again but I'm trying to do this right and only move the shoulder minimally . all bottlenecked cartridge reloading I've done I simply full length size and don't have any trouble. I realize the 30 wcf headspace on the rim so it's less crucial but I'm going for case life and best possible accuracy. I selected 2 cases that had been fired from the same rifle, same brand case (federal) that were identical length . measured after what I would call full length resizing and the sized cartridge actually was longer as measured from the shoulder to the head. I don't understand, the sized brass slides right in to a cartridge gauge so I'm not concerned it's actually grown, I could trim it if required but
the length is fine as measured. The only thing I can think is when the body is sized it's stretching it some. Any tips , again I'm just looking best case life and avoid oversizing - these will only be fired from one rifle.
Unsized
After sizing
Left- unsized. Right - sized.
Any advice would be appreciated . thanks!
I'm having some trouble here, I'm not an experienced bottlenecked cartridge reloader- I pretty much stick to straight walled cartridges. I have loaded for my 30-30 before and I could easily repeat the loading again but I'm trying to do this right and only move the shoulder minimally . all bottlenecked cartridge reloading I've done I simply full length size and don't have any trouble. I realize the 30 wcf headspace on the rim so it's less crucial but I'm going for case life and best possible accuracy. I selected 2 cases that had been fired from the same rifle, same brand case (federal) that were identical length . measured after what I would call full length resizing and the sized cartridge actually was longer as measured from the shoulder to the head. I don't understand, the sized brass slides right in to a cartridge gauge so I'm not concerned it's actually grown, I could trim it if required but
the length is fine as measured. The only thing I can think is when the body is sized it's stretching it some. Any tips , again I'm just looking best case life and avoid oversizing - these will only be fired from one rifle.
Unsized
After sizing
Left- unsized. Right - sized.
Any advice would be appreciated . thanks!