375 ruger necked down to 358

[fseaman.js]

If you pick a barrel length and bullet I will model it in QuickLOAD.

This is fun stuff.

 

[rbTanzan]

I'm not sure what the above case diagram is.
It is not a SAAMI 300PRC, and it doesn't match either a .358 or .338 wildcat version.
FTR, here is the SAAMI 300 PRC.
Notice that is provides a caliber length neck, normally considered a balanced design. If someone wants to neck up to either 338 or 358, then consideration for a caliber-length neck (.338 or .358, respectively) should be added.

 

[rbTanzan]

And for comparison, here are the SAAMI diagrams for 375 Ruger:

CARTRIDGE AND CHAMBER DRAWING 375 RUGER
MAXIMUM CARTRIDGE / MINIMUM CHAMBER
375 RUGER

 

[rbTanzan]

A wildcat set for 2.60" case length would improve the neck length to .31" (2.60-2.29"), approaching 89% caliber-length neck. And 2.60" should be achievable from normal 375Ruger brass after neckdown and/or a firing. Otherwise, a redesigned shoulder would be suggested.

 

[fseaman.js]

I'm not sure what the above case diagram is.

You are correct. It seems my starting PRC from QuickDESIGN is significantly full of errors. Not sure if it's my error or QD error.

 

[fseaman.js]

You are correct. It seems my starting PRC from QuickDESIGN is significantly full of errors. Not sure if it's my error or QD error.

The file is dated 3/4/2020 which makes it QuickDESIGN's error.

Well, these things happen. I'm not having a reamer made so I didn't check it very well.

Edit: Looked for "duplicate" 300PRC in QuickDESIGN. There are 2! The CIP version originally metric is the one in error. The SAMMI version is correct.

 

[fseaman.js]

This should be a little closer to reality, Again, this is not a reamer print just an idea of what it would look like.