Older reloads have much better sd/es

[RadKad]

I still have rounds from last year that I recently shot. The rounds from last year that have been in the closet and only taken out when we go hunting ( 2 hour drive). These rounds gave me with a 5 shot string sd 0 and es 2. So I was running low and made up some more and now I'm getting sd 16 es 39. 6 creed, lapua brass small primer. I am using the exact same powder, primers, brass, bullets etc. My question is, did having the gun powder settle in the case over time cause these lower numbers? Thanks in advance.

 

[FCS]

Same average velocity?

 

[PAYDIRT]

5 shots isn't near enough.

 

[pmclaine]

So load up some new ones and let 'em sit for two years.

You are getting off easy.

The whiskeys I like take 12 years.

Someone will be here soon with a real answer encompassing lot numbers, manufacturers variables, cold welding, throat erosion, etc.

 

[RadKad]

The older ammo was slightly faster. Im using the same bottle of powder and the same primers also. As best I can remember Im using the same processes I used back then as far as brass prep, sizing and loading

 

[RadKad]

5 shots isn't near enough.

Ive done about 25 rounds of each, just doing 5 shot strings.

 

[pmclaine]

The older ammo was slightly faster. Im using the same bottle of powder and the same primers also. As best I can remember Im using the same processes I used back then as far as brass prep, sizing and loading

But for all intents and purposes its a different lot.

Reason why if you find something that works load up as much as you can and realize that even if you do that your throat and barrel wear so as you shoot your primo ammo things are changing even if the ammo doesnt.

Shit like humidity, maybe some powder degradation, perhaps your scale wandered a tenth can make a difference.

How big a difference? I cant say.

How does the impact on target look?

 

[RadKad]

But for all intents and purposes its a different lot.

Reason why if you find something that works load up as much as you can and realize that even if you do that your throat and barrel wear so as you shoot your primo ammo things are changing even if the ammo doesnt.

Shit like humidity, maybe some powder degradation, perhaps your scale wandered a tenth can make a difference.

How big a difference? I cant say.

How does the impact on target look?

Not bad, at 100 about .5 inch and at 300 less than 2 inches

 

[pmclaine]

Not bad, at 100 about .5 inch and at 300 less than 2 inches

Sometimes we can ignore the noise.

 

[whatsupdoc]

sd 0 and es 2 is luck.
Doubt anyone here can get that low for 20 rounds, even 10 rounds.

 

[Dthomas3523]

No.