Mythic Question How fast is Uncanny Grapple

[AngryOrc]

So trying a 7 BloodRager/1 Brawler/Mythic 1
My focus is on Grappling so I saw this:

Uncanny Grapple:

Uncanny Grapple (Ex): Upon making a successful grapple combat maneuver check against a creature you are grappling, you can perform one of the following actions: throw, crush, or swing. For a throw, you can throw the target of your grapple up to 10 feet per tier; if the creature strikes a solid object before reaching this distance, it takes 1d6 points of damage per 10 feet of the remaining throwing distance and lands prone. For a crush, you deal 1d6 points of nonlethal damage per tier. For a swing, you can use the target as a weapon against another creature, treating the grappled creature as a two-handed weapon. If you succeed at a melee attack against an opponent adjacent to the target, both that opponent and the grappled creature take 1d8 points of bludgeoning damage from this attack + 1-1/2 × your Strength modifier.

I then read this thread.

So does that mean that Uncanny Grapple can be use per Grapple check?
so with Rapid Grappler Feat does that mean 3 per full action?

And with Snapping Turtle Clutch Feat

[Weirdo]

Uncanny grapple works when "making a successful grapple combat maneuver check against a creature you are grappling." It doesn't require that you make the grapple check as a standard action. However, since it only works with grapple checks "against a creature you are [already] grappling," its actions only apply when making a grapple check to maintain, not start, a grapple.

So it doesn't work with Snapping Turtle Clutch's immediate action since that allows you to start a grapple (a check on a creature you're not already grappling). This is different from the Meat Shield ability in the thread you linked which lets you make a grapple check against a creature you are already grappling as an immediate action.

aside:

The above is nit-picky. I don't think it would be OP to allow it to work with Snapping Turtle Clutch, and I love the image of a quick grab-swing combo, but I don't think strict RAW allows it.

It will work with Rapid Grappler. However, I think it allows you to take the listed actions instead of one of the normal actions allowed on a successful grapple check (move, damage, pin, tie up), not in addition to. So a grappler with Uncanny Grapple and Rapid Grappler could make 3 grapple checks in a round, and use them to (1) swing, (2) pin, and (3) crush, but would not be able to (1) swing and pin, (2) crush and damage (3) crush and damage.

[AngryOrc]

So Uncanny Grapple just gives you more options with your grapple you don't do any more per grapple check?