How to compensate for Bullet batch differences?

[nimoz]

I have a few loads that work really well, but when measuring the bullets I just got delivered - it looks like the change will be too drastic to ignore.

Goal for load: I use this to shoot F-Class 1,000 yards and I would like to get as many X's as possible.

Current loads that work well for me:
44.2 Varget seated 0.010 off the lands
44.4 Varget seated 0.010 in to the lands (20/1000 longer)
- This was with a .308 Berger 185H, Lot 4119, Average OAL: 1.426", Base-to-Lands: 0.690", Lapua brass

My new batch has an OAL of 1.453" and Base-to-Lands: 0.713"

The difference is more than the 20/1000 that I have different loads for.
- What should I consider changing?

I can't set them further out to keep the case volume constant, as that would move me from a jump to a jam.

I really don't want to remove powder and start testing all over again.

- Any rules of thumb?

 

[leadbullet]

Re: How to compensate for Bullet batch differences?

shoot them first and see what happens then next time buy enough bullets to burn your barrel so that won't happen again.

 

[223ai]

Re: How to compensate for Bullet batch differences?

Shoot it first, then make adjustments. I bet it shoots just fine.

 

[nimoz]

Re: How to compensate for Bullet batch differences?

My next comp is on Saturday.
- Just going with what I have, I would create more pressure on a fairly hot load and probably see 100F weather as well. I'm sure they will be plenty fast

But worse case, I will have to stop shooting.

Maybe I can get some testing time tomorrow.