Moore sisters emigrated from Ireland in mid C19. Help!

[littleorme]

In the will of John Moore - dated 1874, he said his daughters: Sarah, Mary & Bridget  were already living in the US. I have no idea when they emigrated or where they settled. Their father married Catherine in Rathfriland, Co Down, in about 1830.
I'm sorry to be so vague, but the only known family member living in Ireland hasn't helped.
Does anyone have these three women in their Tree? or can offer some advice?
Many thanks.

[*Sandra*]

Can you tell us what the birth years may be 

Sandra

[aghadowey]

The Will was actually written 11 Dec.1873.
The Will of John Moore late of Rathfriland County Down Boot and Shoe Maker deceased who died 22 January 1874 at same place was proved at Belfast by the oaths of Edward Moore Shoe Maker and James Sheeran Publican both of Rathfriland aforesaid the Executors.

I think Rathfriland comes under Drumgath Parish- in which case the records should cover the period you need- https://registers.nli.ie/parishes/0447
Once you have mother's maiden name and approx. dates for the daughters it will be easier to search U.S. records for them.

[littleorme]

Sandra/Aghadowey
Thanks, I meant to say will dated 1873, and John died in Jan 1874.
Therefore probable  that he was born around 1807, and married  a Catherine around 1827/1830.
Communicated with parish priest of Rathfriland who indicated he could not decipher baptism records
for likely period. I also looked at microfiche images at local LDS Centre, and agree they were in poor condition.
I don't know if the daughters traveled together or separately to US. Certainly, they were in US before 1873. Hence I was hoping that perhaps someone has them in their Tree. 
I will try the NLI site as suggested. Might be in better condition than those I'd looked at previously.
Thanks.