I am looking at buying this rifle for shooting varmints, likely 150 yds and in. I'm not a knowledgeable gun person although I own several. There are 2 models of this rifle available. One has a 20" barrel and the other a 24" stainless steel barrel. What effect does the length of the barrel have on accuracy? Another .22 Hornet I like is the CZ-527 American. Does anyone have experience with this rifle, and how would it compare to the Ruger in terms of quality and accuracy? Thanks.