It's also going to depend on the weight of you arrows. The lighter the arrows the more you may notice it. Also keep in mind by changing your poundage as much 10 pounds it will throw the spine of your arrows off. You may need new arrows. That could affect the impact point as well.

And like Tfox said, you could change your nocking point as well, also the added weight may cause you to torque your bow differently.

Keep in mind, whenever you change anything in your set up it may require you to re tune your bow to get everything right again. And adding 10 pounds of draw weight is a pretty major change.

Some times you make a major change and don't really notice anything, other times you make a minor change and it throws everything out of whack. Welcome to archery!

And keep in mind your bow can be out of tune and still shoot pretty well when you practice. Its not hard to get field tipped arrows with addequate fletching to group well at 20 and 30 yards. Even if your spine is off or your rest and nocking point have changed. Either paper test, bare shaft test, or shoot some fixed blades to verify your bow is shooting the best it could be.

If you had the correct spine for your arrows before, I promise they won't be after adding 10 lbs of draw weight.

Paul