One of my friends just picked up a Winchester Coyote in .25 WSSM at a local gun show. It is a very nice rifle, nice wood stock and good barrel weight. At it's first trip to the range it shot 1/2 to 3/4 inch groups at 100 yds with cheap factory Winchester 120 grain ammo. (120 gr. Super-X® Positive Expanding Point)
He then shot 2 rounds at 200 and they were 1/2 inch apart, he was very happy ...
I swapped my 25 WSSM barrel out for a 6.5 WSSM barrel ...
The 25 WSSM was fine, shot the 110 Accubonds just fine, took a large hog and a deer with it a couple of years ago.
I wanted a little heavier bullet with a higher BC, so I went to 6.5 WSSM instead. It is shooting great, I haven't been hunting with it yet though.