I have made noises in several differant threads about wanting to build a .358 Version of a .338 Spectre ( info can be found in several places but is the brain Child of Marty at Teppo Jutsu)
Anyway, here is where I am at, I have a douglass pistol blank ( forget the twist on it, not fast enough for sub sonic but available for proof of concept testing) Cut down and fitted to an AR (pistol as I had only a 11" stub barrel left over from my .358 win FN/FAL project)
I have a set of RCBS .357 Sig Dies
I have a clearance page special Clymer .357 SIG Chamber ream
and I just got 100 pieces of brass on the way from Starline.
I guess i will deep chamber the barrel and back off the dies and see what I come up with.
actually I will likely play with the brass First and see what looks good for a neck length and then try for a chamber about that deep without going way to loose at the rim due to reamer taper.
figuring that the STATED pourpose of this round is to shooot 300+ grain cast slugs at right at about 1000 FPS what would you all recomend as a minimum neck length ? (yeah I want kinda minimum because I have a really small case to work with and too much neck I might not make the velocity)
I am working with 10mm mag brass 1.242 OAL necking it down to hold .358 projectiles limited to an overall cartridge length of Stock AR mags. ( the actual length of which escapes me right now )
comments questions flames disparaging remarks tips tricks or otherwise welcomed
Thanks
Dan