Both the 85gr Sierra’s have the same jacket thickness. I cut the bases off both, melted the lead out and checked. The SPT has a slightly bigger hollow point behind the lead, hence I think they will be a little softer.
For interest sakes, the jacket on both is 0.019” in the shank portion of the bullet. I suspect the 75gr HP will be the same…. Albeit with a bigger HP again
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