Reamers ordered for new cartridge .378 Sniper-Tactical

[Black Diamond 408]

Sierra said they wont make one that big. Richard is supose to have the dies on order to make them.

[MachV]

Wo Hoooo FINALY a long rang 375 bullet,maybe the Mach V will show its stuff.Ben known to get 5000fps outa the little 260s.I wonder if the 300 Sierra's will take the heat?

[Northman]

Any clues about the BC of the new bullet?

[Black Diamond 408]

Norhman,
I was told they will be around the same as the 300grn 338 version.

[davewilson]

BD, i'm gonna ask the next logical question and i'll be a little surprized if you haven't already made a dummy round. let's put this thing on a spotter case. the shortened 50. i think the 375 cal will be enough to let it breath with around 180 gr of powder.come on,show us a picture of the 375 shorty!

[Black Diamond 408]

Dave,

No i haven't done that! I have seen it done before, Lilja's website had the reamers for it. I am in the process of building a 408 spotter imp. A improved spotter case will hold 200grns of powder, i dont know how well a bbl will hold up to this amount of powder down a 375 bore. If and when some High BC bullets become ava for a 45cal this would be another one for the spotter case. Even a 50cal Amax should be very effective, specially for the california dudes! Below is a pic of a 408 in an improved spotter case, a standard 50cal spotter loaded with a 750Amax and a 50cal BMG round with the same 750Amax bullet. My improved case only features the shoulder angle changed to 35deg and shoulder pushed foward, the case taper was not changed. 50cal Short Mag? almost the same results in a smaller package. I look for the 408 version to be outstanding. I feel the 40cal bullets are the smallest dia for case-powder ratio to bore size that should be used.
[image][/image]

Dave

[davewilson]

that's why i would stay with the regular spotter case, would have 170-180 gr of powder and 375 bore.pretty close to the ratio you have with the 408.