I believe there is a big difference between the two styles of bullets. The BT Speer bullets are very soft and volatile compare to the flat base. I shot a bull elk with 160gr Speer BT this Fall at 280 yds in a 7mm saum at 2900 and never made it to the off side lung. Bullet came apart completely where it should have been a pass through with most bullets. My favorite cup and core BT bullet is Sierra Game King. And yes Sierra bullets are tough to find and that is why I used the Speers. Just my experience of 50 yrs of hunting and 35 yrs of guiding.

Last edited by DLSguide; 12/01/22.