ORIGINAL: TJEN

Don't mean to argee but they are very different espeical noticable when bears get up over 300lbs. The hibernate and have to have more hair, more fat, more bone mass, and more mussle to move it around. Because they live all winter form their fat, muscle,and bones. So even a 200lb bear is pound for pound tougher than a deer but with most cartridges it is the bullet choice that is needed to be concidered. Pick a sturdy bullet not a Billistic tip or light weight boat tail designed for long range. But don't use a 220gr 308 or simular combination when the 180gr round nose would be about perfect.

Standard bullets like the Corelokt, power point work fine but a partition or thophy bonded are super choices.
277 140-150grs
7mm 140-160grs
308 165-180grs
338 200-225grs
358 200-250grs

I have seen alot of good sized bears killed with the 170gr 30-30 but a 308win and a 180gr would be better. The 270win is OK just pick a bullet that will punch clean through like the 150gr partition. You want a exit wound so if it dosn't drop right there you have a better chance to have a blood trail to follow. High velocity rounds are not necesary thats why the 30-30win works OK. I prefer 308 bore and up like a 308win, 35rem, 356win, 358win, etc. All mine were taken with a #60 recurve so yes there not hard to kill but the right bullet choice is vital. If you have tracked over twenty wouded bears you would now why. They don't leave much of a trail to follow sometimes just faint depressions in the moss. and don't have the instinct to bed down like white deer do when not pursued.

And dont be over scoped either most likely you will shot less than 30 yards.