Years ago,I thought big bottleneck cartridges and the Venturi effect was in folks heads.

I am a believer now.

My rude introduction to the Venturi effect with increased recoil and bottleneck cartridges occurred with a 30-378 Wby.The muzzle brake was horrendously loud so I removed it and shot some 200gr handloads blindly at a hillside sans scope just to judge the recoil.

That was an eye opener!! I have all kinds of big boomers but the recoil velocity must have been up there burning ~115 grain of powder or I was unprepared. That sucker HURT!!

And no--I don't have that gun anymore.