JBR,
Didn't the lawman who finally caught up with the criminals also use a BAR?
One report I read said that also a .30 cal. Browning water cooled heavy maching gun was used in the ambush.
I'm not the strongest guy in the world and definitely not a good shot,
hence owning a Thompson "chopper". In order for me to try and be
any kind of accurate using my '28 model. I have to aim it using the
leaning forward stance taught in the WWII Army manual. Even with
the added weight of the 50 round or "L" drum it seems to want to climb
to me. The full auto cyclic firing rates of the '21 verus's the '28 model
are noticebly different when you fire the guns. I reload my own ammo
it is a heck of a lot cheaper. And owing to how much and type/brand
of powder used in reloading can alter the cyclic firing rate of a Thompson.
A dirty gun or a gun fired a lot between cleanings will also have a slower
cyclic firing rate. My gun stopped shooting altogether once because of
to much burnt powder in the chamber.

Not a situation that I would want to be in if in actual combat with a "trench broom"!
AMF/Bob-A
