It'll be alright, and depending on how well its put together you'll get out to 60metres easy as with a M110 spring you should be getting in excess of 350fps. 
But then who gives a shit how far it will go if ain't accurate when it gets there? :
Time for you to actually read the link in my sig and find out what it really takes to build a DMR
But then who gives a shit how far it will go if ain't accurate when it gets there? :
Time for you to actually read the link in my sig and find out what it really takes to build a DMR