Sorry, I can only answer 1/2 your question...

When I first bought my Rem 700 Mtn. rifle in .270 cal., I first used the Winchester 140 gr. Silver Tip Boat Tail.
After watching this bullet split into 4 or 5 pieces after hitting the shoulder of a deer on an Alabama Deer hunt
and the inconsistant accuracy (3-4" groups), I decided to switch bullets the following season.

I switched to the Federal 130 grain Nosler Ballistic Tip and love the accuracy (less than 1 1/2"), along with the "non-breaking apart" ability of this bullet/load.

Click to select "bullet/shot" and select Nosler Ballistic Tip to see your choices, if this works.
http://www.federalpremium.com/ballistics/Ammo_Search.aspx