"might be more durable since it is made for shotgun and/or muzzleloader hunting."
Are you of the impression that a scope made for muzzleloading would be more durable than a centerfire scope? This is not true, as many centerfires have more recoil than muzzleloaders. With guns of the same weight, foot pounds equals recoil. Therefore, a 30-06 or 308 will punish a scope more than most muzzleloaders will.
I shoot the muzzleloader with the most recoil, the Savage. I have a Sightron S2, I got it for $180 a few years back. It holds up fine.
Many Savage guys are shooting Bushnell 3200s with no trouble, and some guys are shooting the $80 scopes with good effect.
I do think that you need to get up to the level of $180 to $200 to get a good scope.
I had a Bushnell trophy for a couple years on my Savage. It broke, not because of recoil, but because the gun fell over onto the porch.