>>64058582>works great in winterBullshit. Nobody installed them until the 1950's, they're movie props. They don't help in winter at all, transferring the rationale of enlarged trigger guards to lever loops is just ergonomic blindness.
If you're wearing heavy gloves it's much harder to perform finger abduction, which is necessary for the trigger finger to span the divide between the loop and trigger if your hand is INSIDE the loop.
The finger movement which heavy gloves interfere with the least, and the one which is virtually isolated if you position your hand OUTSIDE the loop, is flexion. Bigger loops don't help do this, if anything they interfere by making it more difficult to meaningfully contact both the outside of the loop and the stock simultaneously.
Also, regardless of which method you use to cycle the lever, bigger loops effectively position the lever further from the shoulder, increasing the degree to which the stock interferes with cycling the action.
There is no practical advantage to them at all, people suggest "cold weather" casually without actually thinking about it.