The 9.3 B&M is the smallest caliber designed for the B&M case for the Winchester M70s in WSM actions. Smaller caliber and bullet selection is reduced drastically because of overall length for the magazine. 9.3 Caliber is not hindered by this and all available bullets I have used in 9.3 has fit perfectly. The 9.3 and 375 B&M have a slightly different barrel taper, smaller than the larger caliber. Thus it comes in at a very nice handling 7.5 lbs with the standard wood stocks. 6.5 lbs with the Winchester Ultimate stock.
Standard barrel length is 20 inches.
In the future I will use the 9.3 B&M as my medium cartridge, replacing all my longer, bigger, and heavier 338s and 358s.
It has proven to be very efficient and has reached beyond my original expectations. Capable of running 286 gr Bullets at 2550 fps and 250 gr bullets at over 2700 fps.
While the 9.3 B&M is excellent with all of the "Conventional" expanding bullets, when you start working with the various Cutting Edge BBW#13s the 9.3 B&M is enhanced far beyond what you can imagine for a medium caliber.
Now let me introduce you to the new 210 gr ESP Raptor for the 9.3s. ESP (Enhanced System Projectile) having a BBW#13 NonCon HP on one end, a BBW#13 Solid on the other, and each box comes with Talon Tips to increase BC by 2-3 times, extending range. The 9.3 B&M is able to run this bullet at over 2900 fps in a 20 Inch Barrel! This is incredible performance and the 210 ESP Raptor shows off by out performing every 9.3 Conventional bullet tested over the last couple of years! Even being light for caliber the Raptor gives superior performance over even the heaviest of 9.3 caliber bullets tested. This bullet is extremely accurate as well. It will become the standard use bullet for the 9.3 B&M. Combine it with the larger hard hitting BBW#13 Dangerous Game bullets the 9.3 B&M becomes an excellent bush rifle able to take on anything that walks.