WB
I used to say the .350 was just a rimless .357 Max
Tuesday, August 16, 2022, 14:39

But the bullets are funky. I think they originally spec. .355-.356 9mm ( the cases are based upon “un-drawn” 9mm pistol brass) then someone found that many states stipulate .357 as minimum hunting caliber. Whoops!!! I found some 145 gr. FMJ factory pulled slugs showed 0.354”!

They are dodgey on the actual bullet specs but generally say .357. I’ve been shooting .358” through my AR. I used 200 gr. RNGC and started with my old favorite .357 Max. powder charges of 1680 and 4227. Velocity was right where I wanted to be, better even, from the 16”. Bested the .35 Remington. The 200 gr. Ran right at 2050-2100 fps! The .350 is longer than the .357 Max.

Checking some published load data I was like 2 grs. over maximum pressures! Yikes! I sure couldn’t tell by primers or anything else. They shot great!?

It still is a bit strange but in actual shooting it performs well. It complies with the straight walled cartridge hunting rules in many states which is why it was developed. In my mind it always reminds me of the .352” .351 WSL for the 1907 semi-auto rifle.