Powder Burn Rate Comparison Charts

[Ontario Hunter]

Sir in 34 years of reloading, that is the flattest primer I have ever seen. I'm not sure what the reloading data says, I would back of a lot. Like 4gr and see what you get.

Here's my source for the 300 gr 404J loads using IMR4895. Says start at 84 gr. I can't imagine running it up to max.

 

[Grumpy gumpy]

Here's my source for the 300 gr 404J loads using IMR4895. Says start at 84 gr. I can't imagine running it up to max.
View attachment 633733
View attachment 633734

I shouldn’t laugh, but old Nick (may he Rest In Peace) was know for going a bit on the hot side, he was a brilliant shooter and exceptionally knowledgeable, but pushed things
Gumpy

 

[1dirthawker]

that is the flattest primer I have ever seen.

+1

 

[Ontario Hunter]

Hammer publishes their own load data. Here's their data for that 307 gr Stone Hammer
View attachment 633594

What was your COAL for those loads?

Remember, 404J was originally designed for RN, not Spitzers.

I pulled a bullet out to 3.565." The cartridge fed from the top of magazine but tip of bullet caught under the feeding ramp when other cartridges are stacked on top. I can remove a slight amount of metal from the receiver and the longer cartridges should feed. However, before resorting to that, I'm thinking I'll cut the powder load to 79 gr and see how the 307 gr bullets perform at SAMMI OAL.