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358 winchester question

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/16/2007 at 18:40
downrange View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: November/07/2007
Status: Offline
Points: 2
Have reloaded some 358s for a new rifle and have an odd situation. I reformed the cases from S&B 308s and find that none
of the suggested loads except one will allow seating a 225 gr bullet to the correct OAL. Only 4198's "starting load" of 37 gr
(Barnes Book #3) will allow a 225 TSX to seat and it is a compressed load. While it shoots very well (3/4" at 85 yards), I can't
figure out why the normal 308 class powders like 3031, 4064 etc all fill the case 2/3 up the neck. I know military cases are
smaller capacity but these are commercial cases. Any like experiences?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/17/2007 at 06:11
RONK View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire

Joined: April/05/2007
Location: United States
Status: Offline
Points: 3199

I haven't handloaded any .358 Winchester, but yours is not an uncommon problem with many cartridges.

Case capacity varies from brand to brand and lot to lot, and so does powder density.

The best way I know to compress powder  is to use a 6-inch drop tube to charge the cases. It aligns the grains of stick propellents as they enter the case and thus allows the charge to take up less space. I don't know if it will help much with ball powders, though. Give it a try and let us know how it works for you. I think I got my drop tube from Midsouth Shooter's Supply. It's just a funnel with a flared 6 inch tube attached to it. You could make one pretty easily if you don't want to wait to get one. Good luck!


(Edited for sentence structure.)

Edited by RONK
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