High velocity

[ARlife4me]

Seating deeper increased speed by raising pressure and made it worse. Pressure equates to speed. Back off and do a ladder test to get back to your 3100 sweet spot and then see if the groups tighten back up again. Go back to your .030 jump.
As for copper, I shot thousands of Barnes bullets with minimal fouling in my barrels. Hammer bullets so far have no copper fouling at all. If your barrel is rough, the more fouling you'll get.

Sort of ! Increased pressure doesn't necessarily create more speed. Going with a faster burning powder can slow velocity with increased pressure. If you're staying with the same powder, then yes. The rest sounds good.

 

[Veteran]

Something doesn't seem right with your load. Hodgdon's starting load for this bullet and powder is 67.2 gr. of H1000 @2847 fps. Max load is 73.8 @3083, they used winchester brass and wlrm primer. I would double check every thing about this load ie case length, charge weight, bullet weight, seating depth ect. Would also make sure the chamber, throat and barrel are not fouled.

He's got 26 inch bbl. Book loads may be for 24 inch.

 

[Baboltin]

He's got 26 inch bbl. Book loads may be for 24 inch.

Book loads is for a 24

 

[Shane Lindsey]

I have found this as well with virgin cases close to max. If loading the same charge, with fireformed, I typically must drop down to find same velocity. In some cases, I have had to start over as mentioned.

As you have a Christensen barrel, I found this especially true with mine. I think they are tight chambered/bored, whatever. It is masked using factory/virgin cases. Not so much with handloads. I actually think Christensen sticks there nose up towards handloads in their rifles.

Reduce it down and look for accuracy. I am in the middle of this with my 7mag now as well.

 

[Veteran]

I really think your main problem was doing load development on virgin brass.

Read this thread paying close attention to Tidus56 comments in several places.

Erratic pressure signs on previously safe load

Hi Guys, I’ve got a load for my 300 wsm consisting of Norma brass, fed 215, 64.5 grains imr 4064, and a 124 hammer. Load clocks about 3700fps, produces sub moa groups, and has not exhibited pressure signs before. I gave the rifle a light cleaning before taking it to idaho this Friday, and...

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