... After doing some reading I came across some old timers talking about wolf trapping using #3 & #4 DLS's. ...
I was wondering as the animal hasn't changed, why have the traps changed so much? (Excluding more "humane") Everything now a days is laminated once or twice, beefier springs, rubber jaws, so on & so forth... anything wrong with using the old DLS's as they use to do back in the day?
I think you answered your own question. "More humane". Trap lockup isn't the same a pressure against the leg. Laminations increase the area of contact on the leg., same as rubber. Laminations and rubber increase mass (weight), thus the move to heavier springs to maintain/ increase trap closure speed. Offset allows the levers to come up higher which based on geometry should provide a sturdier trap lockup.
Using the old #3 or #4, they will catch wolves, sure. Will they do it as humanely as new BMI cert. traps, probably not. I do catch and hold wolves in my 'new' coyote traps; size #3, offset, laminated or cast jaw, heavy springs, base plated, center chained with multi-layer swivels in chain and drag, on a 24 hour mandatory trap check, ... Yes, sure do without foot damage. I don't like finding a wolf in my traps; it's extra work to release the animal! It's not the size of the trap.
It's what respect we as trappers have for the animals we trap.The Great Lakes Wolf is a bit smaller than it's Alaskan cousin, so I guess size may have some bearing, In Wisconsin, we can't use the large traps of Alaska.