150 grn SST 300 Savage

Hello,
Hornady sells the .308 diameter 150 grn sst, then they sell another .308 150 grn sst 300 savage.
Does anyone know what is different between the two of them, their web site calls out different sd's, so there is something different between the two types.
I e mailed Hornady, no response.
I have 2 bolt action 300 savages, 4 99 300 savages, and a 30-06.
I use 150 grn spt .308 interlock, the "old type" bullet in all of them, but of coarse no one has any in stock to sell.
I do find an occasional vendor with the 300 savage .308 150 grn sst in stock?
Any help would be great.

I have wondered that also. Please let us know if you find out anything.

Here is the reply from Hornady.
Steve, thank you for the inquiry. The 150 SST for the 300 Savage was designed to expand at lower velocities than the standard 150 SST. I would not recommend using the 300 Savage bullet in the 308 Win or 30-06. They are not designed to be run at those type of velocities. I would stick with the standard SST bullet for the 308 Win on up. Thank you
Now we all know.
Thanks for the reply Hornady.

The manuals will normally give the optimum velocities for reliable expansion with each bullet type. For eastern woods hunting I would download my old 03-A3 Springfield 30-06 and use 170 grain 30-30 bullets at approximately 2500 fps.

Normally the lead cores have a hardness range with the 300 Savage being softer than the 30-06 bullet lead cores. I also miss my Hornady interlock bullets because they held together so well.

Thanks for the reply.

Sounds like this might be a good 7.62x39 hunting projectile.

Good idea.