Joker:
You really need another cal gun of course.
But, the question is. You going to be trying for fur, or just killing them? That's the question.
Anything will kill them by blowing huge hole's out the other side, or blowing them into piece's like i used to do with the '06.
IF you're into furs. Use the various .17's larger than HMR as a min. OR .223 with 40gr v max as they don't exit. Even a 50gr will blow large holes out the far side that will reduce the pelt value and make sewing hole's nasty.
Shucks man, borrow one, or get it from some hock shop cheap. Work the furs and use them to buy you a nice rifle with good glass. Back in '99 I found a place buying prairie dog heads for $2 each. No kidding! I rebarreled my Sako, new glass, new stock, bipod etc with p/d head money. Plus had enough for a couple tanks of gas left over from one summers shooting. The anti's have fouled up that program now. Sure was great while it lasted though.
George