Because the .270 Win. is larger than the calibers commonly used for varmints and predators (the "normal" caliber range being .17cal to about 6.5mm) there isn't going to be a huge selection of varmint/predator specific bullets for it. Doing a quick search of Winchester, Remington and Federal's websites I found that the only one of the big three to offer a factory varmint load for the .270 is Federal. Winchester doesn't list one at all, but I'm skeptical about the completeness of their ammo listings because the ammo I usually shoot in my 22-250 isn't on there either. Remington only breaks doen their premium ammo into specific cartridge listings, and they do not show a varmint round either, but they may still make a non-premium varmint load that isn't listed.

Federal lists one specific varmint/predator load for the .270. It's one of their premium rifle loads, loaded with 130gr. Nosler Ballistic Tips. Federal claims this load to shoot 3060fps at the muzzle, and I'm sure it'd roll a coyote a$$ over tea kettle at any range you hit him at.

You COULD use any of the faster expanding (lighter) deer bullets, too. But there's still a good change the bullet wouldn't have time to expand much in a coyote, and you'd also have the increased risk of ricochets.

If you planned on handloading then your bullet choices are a lot better. Hornady offers their V-Max bullet in a 110gr version. Speer offers three different varmint bullets in .270 including their TNT HP. Sierra offers the 90gr Varminter. There are probably more offerings from other bullet makers, but you can research them on your own.

Mike