Originally Posted by hdbiker1
Your different velocities could be from slightly different chambers, like in the leade and throat area.
I've loaded Lapua at 43.5gr of Varget and Win at 44.9gr of Varget to get velocities within 17 fps. The difference of 1.4 gr is just from the capacity difference. I'm basically saying that all load data should list components. I'm wondering how many have used data only to find that they've made an overcharged case because the type of brass wasn't mentioned.
The 26" Kreiger with 800+ rounds down the tube and a freshly set back Lapua Match chamber outruns the Savage 12F with a 29" barrel and factory chamber by 150fps with a half grain less powder. I forgot the twist on each. They're close, but not the identical. And, even if they were the same twist, the rifling is completely different.
My point is that all variables matter. So, it's not that helpful to the general public for Hodgdon to publish details.
If you follow safe practices and start at the minimum load, the brass should not get you into trouble.