Have you used this particular SST out of a 243 on deer?
Used them out a 25-06 several yrs ago not impressed
That's a different ballgame. Especially if you're talking about 100 grain bullets in the 25-06.
The 95 grain, 243 SST is a flat based bullet with a relatively long shank section. It has done quite well at my camp out of a 243 on top of about 41 grains of H4350.
