I use #3 coil spring and #4 in long springs, some are offsets some not.. I have a mixture of brands, Victor and I don't recall the better ones I have. Just pulled them out of a box 2 days ago, so I will look and get the name, but I believe they are Alpines.
There are things you can do to make the traps much better, like adding spring under the pan and filing the pan/latch point. I have caught allot of coyotes in cheap ole victors.
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