Hornady Copper alloy 90gr CX

[Bassfish1952]

Hornady's only factory hunting round is the 103 ELD-X which has 2288fps and 1197FT.-LB at 300yds

If I want to go Alloy and stay with Hornady and a 300yd max range the only round seems to be the

90gr CX or GMX which retain more than 1000FT.-LB at a reduced load at 2900FPS down from 3050FPS max

My question 

Is 2900FPS a safe starting position to work up from if I want to keep with my max range of 300yds for a working load ? 

I have been looking at the Hornady reloading data and their ballistic calculatior for my info. That would give me loads at 2900,2950,3000 and 3050 to work with, is that enough ?

Thanks