I’m looking at getting a scope for my 22-250. This rifle will be used for target shooting and sometimes for small game. I’ve read some articles suggesting to use up to 20x scope. The highest power scope I've ever used is 10x and don’t think it would be sufficient for this caliber. Any comments?

I was also wondering about what type of reticle I should get, target dot or mill dot. The only one I have ever used is duplex and I don’t think it would be sufficient for this caliber. Any comments or suggestions would be appreciated. Thanks.....–