Originally Posted by Gaschekt
Originally Posted by Riflehunter
Originally Posted by CashisKing
Originally Posted by Riflehunter
The .308 case, no matter how much you "improve" it does not hold enough powder to get heavy 9.3 bullets such as 286 grains, going fast enough. You are limited to about 50 grains of powder. Once you go to a decent weight 9.3 bullet, you need to go to a slower powder such as H4350, and the .308 case improved will not hold enough of the larger volumes of slow powder. If you run the improved .308 case at high pressures, the primer pockets are too loose after about 3 firings. If you run light bullets in a 9.3, they don't have enough sectional density for anything large. And the more you "improve" the .308 case, the more you stuff-up its good feeding.

So... in your opinion...

Throwing a 175 grain bullet with a poor SD at 2,900 FPS... using a fast powder such as AA 1680... is not a reasonable proposition?
There are better options. If you are interested in the larger bore sizes such as 9.3, .375 then you need a case that's big enough to drive reasonable weight projectiles in those bore sizes at a reasonable velocity. Being restricted to light projectiles because of case size means that you are also restricting the size of the game and the distances that you can shoot them at. In which case, you're better off going down in bore size and using a bullet with a better sectional density. The 9.3 built its reputation on bullets such as 286 grains and a case size that holds around 15 more grains of powder than a .308 case.

This 9.3Jimbo is similar to 9.3x57mm Mauser, which is a similar situation to the 7x57 Mauser/7mm-08 Remington. However, like you, when pushing these heavy for caliber bullets, slightly more case capacity would be nice. Like a Remington SAUM necked up?
You really need at least the .350 Rem Mag in case capacity, although the 300 RCM case necked up or 30-06 improved case necked up should do it. The SAUM and WSM cases will also do it, but you lose magazine capacity which do don't really want to do on anything dangerous or big (because you may be paying a lot to shoot the animal) and you have to be careful of feeding issues with those two cases. The WSM cases may also be a bit too long in many short actions.

Last edited by Riflehunter; 01/17/23.