New Can/Old Can

[HARV6]

I just finished a ladder test in my 7RM and found what I think is a pretty good node. Problem is I've only got enough powder left in this can to make about a dozen more rounds. When I get a new can is all my previous work pretty much worthless? Or will a different lot of powder just need to be tweaked, having the same node, just a few tenths of a grain difference for the charge?

 

[rcmodel]

There should not be enough differance in lots to tell the differance.
Unless you are shooting an Unlimited Benchrest rifle in national competation.

rc

 

[[email protected]]

How old is the last can and how close are you from the max load? If your almost empty can is of recent manufacture and your are not at the max charge you should be ok. You may want to drop the charge a little to be extra safe if there is a few years difference.

 

[Lost Sheep]

Check the lot numbers. If the old and new cans are from the same lot, you may find no difference at all.

Start with a chronograph and check the velocities of identical charges.

Keep in mind that storage conditions may make a bit of a difference, but I would not expect much.

Lost Sheep

 

[HARV6]

The can is about two years old. The powder charge is .4 grains less than what Nosler lists as a max charge of Reloader 19 with a 160 Accubond. No signs of pressure even at Nosler's max. At least none that my greenhorn senses can pick up. I was under the impression that anytime you replaced an old can of powder it was unsafe to just drop in a charge that was safe with the old can. Sounds like that's just when you're dealing with a max charge or beyond published data?

 

[kingmt]

If there is any difference at all it will only be a few 10ths. If you are acually in the node then you will see no difference. After all that is what a node is.

 

[rcmodel]

Powder companies go to great expense and bother testing and blending powder lots to make darn sure there isn't enough differance in lots to matter.

If there were, a lot of people would blow themselves up and sue them all the time.

rc

 

[Arkansas Paul]

Here's what to do.

1. Pour powder from old container into the new one.
2. Shake.
3. Load and shoot.

No worries. Most of us do it all the time with no noticeable difference.

 

[[email protected]]

The powder is only two years old and your not at the max so it would seem that you will be ok.

 

[oldreloader]

I agree w/ rcmodel and AR Paul.. You'll not notice the difference.

 

[kingmt]

I havr noticed a difference between two dufference in Varget I can't remember for sure but it seems like they may have even been the same lot.

 

[Sport45]

I havr noticed a difference between two dufference in Varget I can't remember for sure but it seems like they may have even been the same lot.

That's nothing. I notice differences in accuracy from one day to another loading power out of the same jug!

No, wait. I guess that was me but I'd rather blame it on the powder.