Some folks swear by those 140 Hornadys (.277"), but I'll never use them again.
For whatever reason, I've never been able to get Speers to shoot worth a hoot.
NOT to derail or misdirect this thread, just answering ratsmacker:
I used the 140 BTSPs in Miss in the 80s and they worked fine FOR ME. I had a small PRETTY 8 pt mounted that I kilt using them.
Per speers, I got good accuracy with 270 W and 130 S BT but were EXplosive!!
The 180 30 cal S Hot Cors separated every time on WT from 180 yds------389 yds for me. ONLY fragments exited.
So, round and round we go.
?Maybe? I had bad lots. I don't use them.
Jerry