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I'm not seeing anything wrong with what you've done. H110 is not the sort of powder you'll blow a gun up with. I don't know what firearm you are shooting these rounds out of, but if a revolver, you might want to check the 4th round after firing 3. Just make sure your crimp is sufficient to keep bullets from pulling.
Brass will crack at the case mouth from flaring/crimping. Plain brass will go 10 or more cycles. Nickel-plated will crack a little faster. Using the Lee FCD will accelerate the wear. I've heard of, (but not seen personally), cylinders cut a little too generous that will result in split casings - but I think this is very rare.
I personally like CCI350 primers with H110 - my chronograph shows that they give me much lower Extreme Spreads in velocity. The 240gr XTP is a very good bullet.
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