Burned brass and other anomalies

[whughett]

Common with old, designed for black powder, pistol or rifle case. Too much case capacity for modern smokeless powders. Unless your loading for a specific velocity/foot pounds of energy switch to TrailBoss no more problems.

 

[tightgroup tiger]

So, what I am gathering from the comments is that I can safely go higher than the max load since my bullets are plated and my data is for lead. Also that I may need to buy a chronograph?

This is what I'm saying. Straight from Berry's Bullets
https://www.berrysmfg.com/faq

 

[tightgroup tiger]

What most of this boils down to is as long as you stay under the 1250 fps per Berry's , your bullets are happy.
You keep your pressure under the SAAMI standard of MAP of 14,000 psi pressure your gun is happy.
If VV N340 will stay under SAAMI MAP (Maximum Average Pressure) (14k) with the 9.2-9.8 load that VV receipted for 250gr jacketed bullets, then you can surely go up to the minimum load of the jacketed data (9.2 gr) with no problems with your plated bullets.

 

[243winxb]

If we look at N320 data, the 200 gr jacket vs lead, may give a clue what is safe?

Not you powder or bullet, just a comparison of lead vs jacketed study. https://www.thehighroad.org/index.php?media/albums/load-data-lead-vs-jacketed-bullets.265/

View attachment 1031617 45 Colt

 

[tightgroup tiger]

243 Winxb, you totally lost me on your post. What are you saying here?
Your example of this

is showing that the lead bullet is taking more powder than the full metal jacket is taking. We know that is because the lead bullet has less friction and takes more powder to get the correct pressure to make velocity.
How are you correlating this to plated, in between lead and jacketed?

 

[243winxb]

Jacketed bullets produce more pressure then plated or lead, using the same powder charge. So using jacketed data should work for plated & lead, some of the time, but not always.

 

[tightgroup tiger]

Agreed.