Most people don't know how to select, use or rig beavertails properly, and snowshoes like the atlas aren't bad but they need longer tails. The ovals things are junk, suitable for the amount of snow that the guy towing the sled is walking on only

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If you're over 200 lbs snowshoes of any style are going to be a problem in deep powder - you're just too heavy for the area. When beavertails were conceived, not many indians weighed that much...
The teardrop beavertails come in four basic configurations - long and narrow with a point, long and narrow without a point, shorter and broader with a point, and the most common shorter and broader without a point.
The pointed versions are for drift busting along open snow lanes. If you're walking in a lot of deadfall they can snag readily. More commonly used in open fields, or on the shield where the snow drifts and there is less hardwood bush.
If they fit you properly, and you've rigged them properly (free swinging at the toe, tied so as not to swing much), the fat part fits into the side cut out of the beavertail in a more or less normal gait. When you walk, the beavertail should never leave the ground - its a rudder to keep them pointed in the right direction. If you're slapping around like a duck, they are either the wrong size for you or you haven't rigged them right. They are also not designed for snowmobile boots

- the toe has to pivot into the hole at the binding for them to work right. The indians didn't wear Sorels, originally...