Originally Posted by new shooter
AJ could you do the same thing with the 338am? Did you play with differnt seatings with your 338am? What did you end up with for ES and velocity and powder and load? Kirby starded to put my 338am together last week.
I will be doing the exact same thing for my 338AM. I only had a few days from the time I received my 338AM until my elk hunt. I used the low end loading and tried a few seating depths until I found one that worked well, it ended up being a few thou off the lands and it shot great, so I left it. I will be fine tuning the load this spring (as if being able to hit at 1200+yds needs fine tuning!). I am using 143gr H50BMG, Fed 215M primer and 300SMK. Email me at don_peacock at hotmail dot com if you want to discuss in detail. Velocity leveled out at almost exactly 3300fps with once fired brass, a little lower on the new (only fireformed) brass. I didn't shoot enough over a chrono to do an SD or get a lot of data for a meaningful ES. The few rounds I checked were very close to 3300fps.
To use the hand-press on the 338AM, you need to grind a short flat on the front edge of the shell-holder, as it will rub the press otherwise. Then you insert the shell into the seating die and then install the shell holder over the shell and into the press at the same time (super easy to do, hard to explain).
I actually reloaded some 338AM today and loaded them all real long so I can do final seating at the range. I seated the first 5 to my known good length using the hand seater and it worked perfectly (I did need to readjust the die, but thats not a big deal). I placed another lock ring above the first one, so I can easily reset for my big press.
Hope that helps,