6.5 SMK 140 vs. 142 ?

[LitLBoy]

Besides the obvious what is the difference between these two bullets? Any changes I need to make to my load when going from one to the other?

 

[mikegaiz]

142 shoot better in a 1 in 8.5 barrel around 2900 fps.

 

[Shynloco]

142 shoot better in a 1 in 8.5 barrel around 2900 fps.

+1. Discovered the same which is why I kept the 142's and sold the 140's.

 

[xpilot]

In two 6.5x47s, both prefer the 142s. I don't know the reason.