Pros & Cons ?
 

I am currently using the .45 cal. 240grn.hornady xtp with very
good results. Would there be any advantages or disadvantages
to trying the 10mm 200grn xtp. I should tell you I am shooting
a NEF Huntsman,which has a tight fitting bore,so I am using a
mmp 3-petal ez sabot,oh and this is a .50cal.

RE: Pros & Cons ?
 

Cayugad has been using the 10 mm 200 gr XTP in his 50 cals. I am sure he will let you know his results.I seem to recall him having some excellent accuracy with it in at least one rifle. I don't see any advantage or disadvantage for switching. Unless maybe the 10mm may shoot a bit flatter for you. But again, that would be dependant on the charge.
I use this bullet in my 2 Green Mtn 1:30 twist 45 cal barrels with excellent accuracy. And I would not hesitate to use it on deer. I shoot 80 gr of Pyrodex P and a Harvester blue EZ load sabot.

RE: Pros & Cons ?
 

Advantages:

-Flatter shooting at long range (no real difference inside of 100 yards)
-Less recoil

Disadvantages:

-None, provided your rifle will shoot them as accurately as the 240 grainers

The 10mm 200 grain XTP's have been very solid performers for me on deer. They're probably a bit light for anything bigger than deer, but that's not an issue for me. They also tend to be very accurate for most people when you find the right sabot/load combo.

RE: Pros & Cons ?
 

200 grain Shockwaves and even the XTPs in 50/40 sabots from MMP work great in my inlines. BUT I have not harvested a deer with them. They are accurate and I would have no problem hunting with them.