When a lot of .30 Browning armed tanks were firing their Brownings (usually ast the hundreds of fig 11 targets spread across the whole range area - meant to represent thousands of charging VC or NVA or Chinese Infantry, you could always tell the Brownings with a loose barrel jacket as you could see the tracer bullets spread about all over the place wildly in front of you. That was a sure sign that the gun needed fixing later. The tank crews didn't care too much, not when they had zillions of rounds to get rid of before the end of the week.
And if the zillions of wasted .30 didn't kill all of the targets then the follow-up cannister rounds did. Imagine a 120mm shotgun on steroids............ There were two types. The first fired a zillion-x finger diameter 1" or so long sharp guillotine chopped re-bar type things. And the second type, for close in protection - so said - fired about 10 zillion steel guillotine chopped square steel plates, each approx 3/4" x 3/4" with razor sharp curled edges. These shredded anything. You could hose down other tanks that were being swamped.
Happy days on the ranges as young Armourers eh Tankie?