What's your favourite "varmint" rifle, and what for?

[Wapiti]

I'm interested in what you blokes use as a dedicated varmint rifle?

Longer range, flatter-shooting cartridges that are used on animals - rabbits, nasty birds, foxes, dogs that type of thing.
Stuff that has enough oomph.
22-250? 220 Swift? 25-06 for dogs?

For example, you might be set up at a shearers quarters, overlooking a lambing paddock where foxes are sneaking in.
Or, same deal, except that 300m out across the fence, crows are gathering in a big dead tree to have a go at new-born kids or lambs.
Or overlooking that hole in the fence 250m away where dogs are coming in to take out the chickens or the small fluffy farmhouse dog.

What do people consider a true useable "varmint" rifle? With a reasonable cartridge speed and flat shooting?
I don't think for example a TRG M10 qualifies, that's for something else.

If I was to put in a PTA for one, what would be a good cartridge, and a suitable model and brand of rifle, to be relatively flexible and take care of all those jobs?

[ButchDDG41]

I have a 22-250 and 223. The 223 is an LA102 Varmint, and would be fine posting up in a 'shed' but carrying it further than a few 100m would not be fun. The 22-250 is an old Rem 700 ADL B series that still shoots well and does everything the 223 does however ammo is harder to find and is double the price in some cases. The sako stuff 55 grain works well .

I was looking at a cz515 in 22mag but alas, NSW.

[Damo300]

I have a Tikka Super Varmint in 300wm...but that's not for hunting critters.

I think I'm going to get myself a 204 Ruger. What can I say, I love speed, and of course it would be a tikka or sako.
Everything about that cartridge screams fun to me, and the only 22 I have is the LR.
I'm looking carefully.
Great thread.
Keenly interested in everyone's perspective.

[Bugman]

243 suited me fine for many years. From the odd bunny to goats.