The best we have ever gotten was 2775 from a 28" in the 300 win. I would be interested in your 2850 / 26" load?
The 215 we get 2900 to 3000 from a 26" and has a G1 BC of .696 the 230 is .743. Noticeable but not a ton of BC difference for a 200 fps gain. The reason I now shoot the 215 from my 300 win.
The loss of 200fps seemed excessive for a bullet that only added 15gr weight. I wouldn't have expected any more than 100fps difference. So I reviewed the bearing surface length of the 215 Hybrid Target versus the 230 Hybrid Target versus the 230 Hybrid Tactical OTM. This data from Berger's web site:
215 Hybrid Target - 0.419"
230 Hybrid Target - 0.495" _ 18% longer bearing surface than the 215.
230 OTM Tactical - 0.560" _ 34% longer bearing surface than the 215 _ 13% longer bearing surface than the 230 Hybrid Target.
I think you stated your son was shooting the 230gr OTMs? The 230gr Target bullets with their shorter bearing lengths should improve MV.
I'm going to try some 230s in my rifle. Based on the difference in bearing surface lenght, I'll purchase the 230 Hybrid Targets.