Thats what I thought too, I was just hoping with the Broughton that the 3400 would be about right.

Loading some tonight, hopefully I'll have some time this week to shoot them.

Using a premium barrel will not normally add 150fps at the same chamber pressure.

Not usually, but the 5c is known to be faster (100-200fps) then other barrels...

As usual, that blows my STW away. I am getting 3250 with 160gr accurbond and RL25.

My own 7mmstws produced 3500fps to 3550fps with 26" barrels with Schneider and Kreiger barrels and 140gr bullets,so I don't consider 3550fps to be all that fast.

So how come yours isn't?Your own barrel goes against your theory.

Well my first two loadings on the brass were...but now I would like to get more firings out of the expensive brass so I'll load it down and still get the same velocity as guys running more powder then me...

If you can only get two or three loadings out of your brass,you are developing way too much chamber pressure.The extra velocity is due to the extra chamber pressure,not some special barrel.

Could be but I'm running the same load as other guys and they are only getting 3200-3250 when I was getting 3400...

Read up on the Broughton 5c a little...

And I had two 300ultramags,but one produced 100fps more with the same load.However both rifles produced very similar velocity before showing any signs of excess pressure.One rifle may have had a slightly smaller chamber,so it simply made more pressure,and therefore more velocity, with the same load.Some individual barrels do produce more velocity than others at similar pressures,sometimes even supposedly identical barrels by the same manufacturer.