08-31-2020, 09:06 PM
I was joking about the chrony - I haven't figured out where the smileys are on this forum yet. 
I would hope they're using radar!
Hornady's data says they are using a Noveske barrel. My Proof 6.5 CM barrel runs a tad slower than what most data predicts but it's not significant - maybe 20-40 fps. I do take the time to find the powder that's going to give me the best node (SD and accuracy) approaching max velocity.
Putting both 105 grain Nosler RDF's and 105 grain Berger Hybrids next to Hornady 105 HPTB on the screen and they are definately sleeker and certainly appear to have less bearing surface so a little can be explained there. In fact, it's such a pig that the Berger twist calculator says my 1:8 can stabilize it while the RDFs and Berger Hybrids get compromised.
But even if I look at my LBC vs Hornady and account for smaller bearing surface of 95 SMK vs 95 SST, slightly larger case, BHW-ness of barrel and maybe being slightly over 52k PSI, I'm still getting 2750 vs the 2600 Hornady gets using the powders that usually give top velocity (at the cost of temp sensitivity)
I would hope they're using radar!Hornady's data says they are using a Noveske barrel. My Proof 6.5 CM barrel runs a tad slower than what most data predicts but it's not significant - maybe 20-40 fps. I do take the time to find the powder that's going to give me the best node (SD and accuracy) approaching max velocity.
Putting both 105 grain Nosler RDF's and 105 grain Berger Hybrids next to Hornady 105 HPTB on the screen and they are definately sleeker and certainly appear to have less bearing surface so a little can be explained there. In fact, it's such a pig that the Berger twist calculator says my 1:8 can stabilize it while the RDFs and Berger Hybrids get compromised.
But even if I look at my LBC vs Hornady and account for smaller bearing surface of 95 SMK vs 95 SST, slightly larger case, BHW-ness of barrel and maybe being slightly over 52k PSI, I'm still getting 2750 vs the 2600 Hornady gets using the powders that usually give top velocity (at the cost of temp sensitivity)