Got the Hornady 150 SST "Savage" bullets today. Here are some specs according to my caliper and old shaking paws:
OAL: 1.100"
Small diameter of boattail's taper: 0.260"
Large diameter of taper: .308"
Length of taper: 0.2"
The boattail section is very long for the bullet length, though the bullet sits sort of "weight forward" compared to say a Nosler BT. Hornady has not published a BC yet.

I hate how no vendors will show you side by sides, so here are a few:

1. Ordered by weight/length. THe Savage has a small red tip:
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L to R : Sierra 125 SP 2120, Nosler BT 125 gr. 30125, Barnes 130 gr. TTSX, Hornady 150 gr. SP 3031, Hornady 150 gr FMJBT 3037, Hornady 150 Gr SST Savage 30303, Sierra 165 gr. Game KIng HP 2140, Sierra 165 gr. SP 2145, Nosler 168 gr. BT 30168, Speer 180 gr. Mag Tip 2059, Nosler 180 gr. Partition Protected Point 25396


2. Ordered by length only:
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L to R : Sierra 125 SP 2120, Nosler BT 125 gr. 30125, Barnes 130 gr. TTSX, Hornady 150 gr. SP 3031, Hornady 150 gr FMJBT 3037, Hornady 150 Gr SST Savage 30303, Sierra 165 gr. Game KIng HP 2140, Sierra 165 gr. SP 2145, Nosler 168 gr. BT 30168, Speer 180 gr. Mag Tip 2059, Nosler 180 gr. Partition Protected Point 25396


3. Smaller weights side by side:
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L to R Comparison 150 Hornady SST Savage 30303 vs. Sierra 125 gr. SP, Nosler 125 gr. Ballistic Tip, 150 gr. Hornady SP flat base, 150 gr. FMJBT, Barnes 130 gr. TTSX


4. Larger weights side by side:
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L to R comparison 150 Hornady SSA Savage vs. : 1. Speer 180 gr Mag Tip, 180 gr. Nosler Protected Point Partition, Sierra 165 gr. Game King HP, Sierra 165 gr. Game KIng SP, Nosler 168 gr. Ballistic Tip