I have a 6.5x55 and I was wanting to try it on cyotes. Just wanted to know if anyone has had any experience with this caliber on varmits. I was wondering what would be the best cyote load.

Just about any pointed expanding bullet will do fine once the caliber gets that big.

Hornady makes a 95 gr VMax for the 6.5. Check your twist in your 6.5-55 and ask here if others had any luck with that bullet and the same twist as you have.

I bought some nosler 100 gr bt's that I am going to load up and try what's the opinion on those.

depends on what you are wanting. if you are wanting to save the pelt. I would think a tough hunting bullet, would do the trick maybe an accubond or interbond, so you don't blow up the dog especially when using a bigger bore. If you want to blow the dog inhalf use a varmit type bullet