Originally Posted by Rusty Nail
My father in law has a new 257 stw and we are working on load data for it. But wondering what the trim length of the case should be? I understand you neck down the 7mm stw case, but I,m just looking for overall case length for the 257 stw. Thxs for any help
I have a 257 stw. And a 257 stw ackley The way both of mine are chambered I trim to the same length as the 7 mm stw case. Not sure if you have loaded any rounds yet. Mine are pretty picky about the loads. I was using r25 for a while but I would get pressure spikes. Now I have been using the ram shot magnum which is basically a ball powder. The longer stick powders bridge and cause spikes in mine.