I was looking through Speer's latest manual, yesterday, and noticed that thier data provides SIGNIFICANTLY higher velocities for the 7mm-08 than other data sources. All this from a 24" barrel. Anybody got any ideas on why this is? Their data was, if I remember correctly, from a Remington 700 with a 24" barrel, but the other sources showed a 24" barrel, as well.

Happy New Year to everybody!

John

Did you ask Speer?

Were their loads showing more powder?
I've noticed theirs to usually show a heavier charge compared to Nosler and some others. THey test in real prodiction guns, not tight chambered pressure barrels.

BUGHOLE: Speer works up the loads in SAAMI compliant pressure barrels and then shoots the loads from production guns to list velocity for their book. Only for cartridges that pressure barrels are not readily available do they work up the loads by case head expansion and primer appearance and other related signs.

I wondered if they had got the 280rem and 7mm08 data mixed up as they show the 7mm08 to be significantly faster with 175gr bullets than the 280!

Isn't the 280 still loaded to lower pressures? It used to be.

I don't recall if they were showing heavier charges, but I think they were showing 2900 fps+ for the 145gr.

John

I'm shooting 45gr IMR 4064 with the 130 gr speer flat base....any velocity info? I don't have a chrono. And do they list a max load with this combo?