I am supposed to have one of the Stainless Marlins on the way... go to the Marlin site, they have a rimfire forum,, couple of pages back a Varmit Al has some great pictures of what they call out west ground squirrels,, looks like our tree squirrels only tail not quite as long,,, its devestating on these, and does not exit... large groundhogs will be pushing its capabilities.. he even has a video of it hitting a diet coke can.. I shoot a lot of crows out of my bedroom through the sliding door with my 22-250 and it rattles the windows.. these shots are at about 90-135 yards,,and this seems like a great gun to do this with...about the cost of me loading my 250,, but not factoring in the time involved which is at a real premimum,,, so far Ruger Marlin, NEF and Anshutz are going to chamber rifles for it with I think a semi-auto pistol. the bullet is only 17 grains,, and offers hardly any ricochet potential,, after penetrating only 1" of clay the largest piece weighs only 9 grains.. why its only good on smaller game...