Interesting replies ... love hearing what others think will work on seals.
Otokiak
Rankin Inlet, NU
CANADA
.223, 22 250, even .222 or all the way to .243
the cheap 7,62's are somewhat popular as well...
A majority of the local hunters up here use small calibres ... I've seen the odd 303 and 308 used ...
How big are the seals? Are you hunting for pelts or meat? If its for pelts, something like a .223 with FMJ bullets should be lots. If it is for meat, I think a varmint bullet would provide a more certain kill, again in something like a .223 or so.
This is coming from someone who has never seen a live seal in the wild, so take it for what it's worth.
Mark
Mark, we use the whole animal so it's for food and the pelt. FMJ is illegal. The ujuq(bearded) seals can get HUGE as big as a human or bigger ... Ive seen ones stick 4 feet out of the water and that was only 1/2 of it, qairulik(harp) seals are medium-big in size, natsiq(ringed)seal's are small, najangaq(no word in english I know of) are so small you'd think they were babies.
The most popular rounds for harp seals in Newfoundland are .223 and .22-250, followed by .222 Rem.
However, many pelt hunters would love to use .22WMR, but are not legally allowed.
Interesting choice on the 22WMR.
From what I understand they have a skull about as thick as an seashell......The rumor has it that local fishing guides prefer the 22LR....I'll say no more.
I hear they sink.
Yes the skull is thin ... however, I've seen harp/qairulik seals shot twice in the head and still trying to swim ... and yes I've seen 22lr used also ...

... and yes they do sink in summer if you're not fast enough to hook'em, however in falltime they are super fat and float.
D
on't kill the cute little seals!!!! haha
no seriously though go for it.
I dont have caliber advice but I was wondering what seal meat tastes like?
Cooked of course.
Only way to describe it is RICH in flavour ... very strong ... never had it cooked ...
.223 or .22-250 is what you usually see, though I am partial to the .204 Ruger. Head shooting seals is probably as close to shooting sod poodles on the prairies as I will ever get.
That would be a good comparison ... however, it gets interesting when the water get's a bit more rough.

I almost purchased a 204 but heard barrel life isn't so good.