What the heck?!

[Clem Bronkoski]

I've been shooting 42.4 gr of H4350 with a 143 gr ELD-X in my 6.5 CM for a few years now and I was looking at the hodgdon load data just now online and it's showing 40.0 gr as a max load and compressed! What gives? It wasn't that low before.

 

[Clem Bronkoski]

Sierra list 41.9 and nosler list 41.0! I'm not showing any pressure signs.

 

[cajun]

Hornady has 41.5. I'm shooting 42. Your probably fine. I pay more attention to velocities listed. Powder charges can vary with brass.

 

[std7mag]

Powder charge change with different brass.
Published charge weights are going the way of the 80s & 90s triggers being lawyered up.
In this case, down.
Different lot numbers of powder are different.

Most importantly, your gun is different from theirs.

 

[lancetkenyon]

"Lawyer loads".

 

[med358-boise]

I've been shooting 42.4 gr of H4350 with a 143 gr ELD-X in my 6.5 CM for a few years now and I was looking at the hodgdon load data just now online and it's showing 40.0 gr as a max load and compressed! What gives? It wasn't that low before.

Nothing gives. Your assuming a level of granular consistency that simply does not exist across the equipment, the load development process, seating depth, case capacity of the brass, and the risk tolerance of the publisher.

 

[Tom264]

I'd go to where the brass started showing signs….
Manuals are a starting point for me.

 

[Clem Bronkoski]

With 42.4 gr and starling brass I'm showing no pressure signs at all.

 

[FrogFire7]

Could also be that that particular manual (in addition to the case volume differences noted above) used a different lot of powder (very likely) and it has/had a differing burn rate from what you are using. You'd like to think it wouldn't vary much, but I'm told it often does

 

[Bullbuck]

I've seen large swings in velocities from powder lot to lot

 

[NikiskiDave]

42 gr and no pressure signs in my 6.5

 

[Shane Lindsey]

CHOOTIT...when you get a new lot of H4350, just re-do the ladder or load a few and see if it is still accurate. Velocity may change with new lot.