I get ~0.4 from my 110gr prairie dog load, so I think the accuracy is fine. Effectiveness? I shoot along side a 6.5 RPR, and I can hang on a calm day out to say, 1100. Any wind though and 800 is pretty much it.
That said, 308 kicks a 6.5’s ass with subs, and I love subs. Trailboss is money.