Mounted Archery + Stable Gallop

[HyperMissingno]

Mounted Archery wrote:

The penalty you take when using a ranged weapon while mounted is halved: –2 instead of –4 if your mount is taking a double move, and –4 instead of –8 if your mount is running.

Stable Gallop wrote:

Your AC penalty when charging is halved. The penalties on ranged attacks made by your rider are reduced by 1 when you take a double move and by 2 when you run (minimum penalty of 0). Your rider gains a +4 bonus on concentration checks caused by your motion.

Which reduction comes first when you make ranged attacks?

[My Self]

Which Mounted Archery? The feat, or the samurai class feature?

[HyperMissingno]

Feat.

[My Self]

Huh. What if you stacked Mounted Archery, Mounted Archer, and Stable Gallop?

Samurai wrote:

Mounted Archer (Ex)

At 4th level, the samurai becomes skilled at firing ranged weapons while mounted. A samurai only takes a –2 penalty on attack rolls with ranged weapons while his mount takes a double move. This penalty increases to –4 while his mount is running.

[HyperMissingno]

If you want to know please ask in another thread. I'm trying to figure out which feat has the priority on effecting the penalty for a character that's not a samurai.

[My Self]

Well they all stack, no? You could say the penalty is halved, then the penalty is reduced by one, then it's set back to -2 and -4. Or that it's reduced by one, halved, then set back to -2 and -4. You're asking an order of stacking question, and this is something that gets stacked.