Did you do a new load workup for the boattail bullet? Can't just swap out one component of a load and expect it shoot the same as it did before.

Depending on when it was made it could have either a 1:9.5" twist rate or a 1:11.5" twist rate. Prior to 2008 Savage 7mm-08's all had a 1:9.5" twist rate. Then in 2008 someone at Savage had a brain fart and decided to change it to 1:11.5". The 2008, 2009 and 2010 catalogs created confusion over this change as it shows all the 110-based models in 7mm-08 with the 11.5 twist and the Stevens 200 in 7mm-08 as having the 9.5 twist, but in reality they were all the slower 11.5 twist for those years (this verified by several folks at Savage).

Savage went back to the faster 1:9.5" twist rate in 2011 and that's what it's been since. That said, with the ease of swapping out barrels and the fact that Savage unloaded it's inventory of slower twist barrels to Numrich's it's best to check your barrels twist rate yourself by using the cleaning rod method to verify which you have.