Velocity changes

[spudgun]

last week I was shooting 1000 yds and noticed that out of 5 shots 2 were 2 MOA low. This was occuring on both my 6.5 Cm and 6 CM.
The shots that were low crono'd at the target 90-99 fps slower that the others.

Last night I loaded up 10 rounds each and this time I double checked the powder weight (40.6gr H4350) and the OAL for bullet jump. Took my time doing this to see if maybe last weeks load was in error on my part.

Today, I have same issue with 1 or 2 out of 10 doing the same thing (80-90FPS slower at target). Barrel temps were 130 deg and I was slow shooting.

I have blended all my H4350 that I have on hand to assure consistant powder.

Also did not notice any of the 20 rounds seating harder than others so I didn't suspect higher pressure due to bullet seated tighter.

All brass is the same (star line)

Any one have this issue?

 

[bozo699]

I have blended powder for years when need be but I think you answered your own question, I’m guessing it’s not thoroughly blended
Wayne

 

[spudgun]

I have blended powder for years when need be but I think you answered your own question, I’m guessing it’s not thoroughly blended
Wayne

Well, I tried to blend the 8 lbs I have but your comment does now make me wonder just how well I did.

I guess i know what I will be doing tonight.

Thanks for the comment.

larry