Originally Posted by Angus1895
Velocity with a monolithic is beneficial. Sectional density for close range is my concern. If it is above a .20 u should be good 2 go.

S.D., 80 gr. .257 TTSX is .173.

Check this observation about the 80 gr. TTSX at 3,900+ fps out of a .257 Wby being less than effective for a cull hunt.

www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/12175458

Waiting on Model70guy to respond to the question of why he considers this load to be a "POS".

I think I know the answer, but will see what he says.

DF


Edited to add, the 80 gr. 6mm TTSX/3600+ fps load that I had issues with, that bullet has an S.D. of .194.

So, maybe the .20+ S.D. value may have terminal performance importance with small TTSX/TSX bullets pushed at very high speeds. More info needed.

Last edited by Dirtfarmer; 07/30/17.