Help needed in load development

[KOOutdoors]

Can someone help me out

Lapua brass, VV N150 powder, Fed. 210m 155 scenar

[img:left]

[/img]

[img:right]

[/img]

[img:center]

[/img]

 

[Wolfish365]

Re: Help needed in load development

Just a few questions.. What cartridge are you reloading for? Is it a factory or custom chambering? What length barrel and twist does your rifle have?

 

[KOOutdoors]

Re: Help needed in load development

308 win. FN A5M. 1:12. 24" barrel

 

[Wolfish365]

Re: Help needed in load development

The twist rate you have is good with 185gr or less bullets, so that shouldn't be an issue if you're using 155's. I prefer CCI primers but to each his own. I've never used that powder, I've heard it's a bit temp sensitive.

 

[MALLARD]

Re: Help needed in load development

45.2 seems to be ideal

 

[MitchAlsup]

Re: Help needed in load development

I have a bit of a problem with the data.

Top image: 44.4 is low-right, 44.8 is high-right, 45.2 is low right again. I guess I am surprised that the barrel goes through a whole node in 0.8 gr. All three seem to shoot well. Just wondering is a cross hair target (+) would have worked better than a paint spot. At 2.860 in a match chamber you could be into the lands.

Bottom image: 45.2 seems to be the better load. At 2.807 these are probably well off the lands, and are probably working at lower max pressures.

A) Do you KNOW that 2.860 is into of off of the lands?
B) Do you know how far 2.807 is off the lands?
C) Were there any pressure sign DIFFERENCES between the 2.860 and 2.807 loadings?

 

[KOOutdoors]

Re: Help needed in load development

No pressure differences noted. To the lands is 2.885