8mm-.06 with IMR7828?

[Jgjgjg]

I have an 8mm-.06 that I have not looked at in a good decade, and am missing a very detailed reloading log that I am afraid may have gotten destroyed in a flood a couple of years ago. Back to shooting that rifle, I found a box of handloads with relatively good notes in the lid: bullet weights, powder, charge weights, base to ogive distance, etc.

Two rows of the rounds are loaded with 57 grains of IMR7828 behind a 200grain projectile. Please note that before I took a long hiatus from all things Firearm related, I was very a meticulous reloader. Wandering off the reservation or getting near the top of the pressure curve I actively avoided.

Now I am befuddled, and that’s why I’m here. I have searched 10-20 year old Speer, Hornady, Nosler, Barnes, and Swift reloading manuals as well as the internet. I cannot find a single mention of IMR7828 in 8mm-.06. For that matter, I can’t find IMR7828 listed in those manuals for any caliber I’ve ever had.

And yet….there is a 1/4 consumed 8 lb bottle of it on the shelf. Which means not only have I used it, but I’ve shot it. Have I shot it in 8mm-.06? Are these loads the beginning, or end, of a series? No idea.

So, question for you guys: do any have you have, or know of, a load for 8mm-.06 using IMR7828?

 

[cornfused]

I can't supply you with an answer regarding 7828 in the 8mm-06, but I can give you some suggestions from over 30 years experience with both the 8mm-06 and the 8mm-06 AI. I have found that, even with the heavy bullets (200 - 220 gr.) the standard 8mm-06 runs out of case capacity with any stick (extruded) powder much slower than H4350. I've always wound up going back to H4350 or H414 with the heavy bullets. I think 7828 would be way too slow burning to achieve usable velocities in the 8mm-06. Just my 2¢

 

[Jgjgjg]

Do you think there is a hazard? I’m tempting to fire them. But if there is a hazard I’ll disassemble and go with another powder and a known safe load.

Interestingly, this weekends range trip used some mystery rounds that I believe were 200gr hotcor and some recently loaded rounds, mid in the power range with 4350 and a 175 grain hornady. The rifle was sighted in 4” high (rounds struck low) for the mystery meat—but 9” low for the known rounds. So, mystery meat was crawling along relative to the zero which was already set for something very slow. Makes me wonder what the heck I was thinking back in the day.

This is a great cartridge — I really enjoy having a BOOM when others are getting by with a pop or a bang.

 

[cornfused]

There is a slight chance that a reduced load of very slow burning powder can result in detonation rather than a controlled burn. I'd disassemble the rounds and reload with a more appropriate powder.

 

[Slamfire]

Do you think there is a hazard? I’m tempting to fire them. But if there is a hazard I’ll disassemble and go with another powder and a known safe load.
.

I really doubt you are going to have a detonation. You probably won't have a stuck bullet at your charge levels. IMR 7828 is a slow burning powder and I would not have used it in your application. I am currently reloading a 35 Whelen, a 358 bullet in a 30-06 case, and it likes powders from IMR 3031 to IMR 4064, which are much faster than IMR 7828. Where you came up with the idea to load this cartridge with IMR 7828 I cannot imagine. Make sure the target is far enough away so that if the bullet bounces off, it will fall to the ground before it reaches you.

 

[Jgjgjg]

Will do. Thanks.

 

[Jgjgjg]

I really doubt you are going to have a detonation. You probably won't have a stuck bullet at your charge levels. IMR 7828 is a slow burning powder and I would not have used it in your application. I am currently reloading a 35 Whelen, a 358 bullet in a 30-06 case, and it likes powders from IMR 3031 to IMR 4064, which are much faster than IMR 7828. Where you came up with the idea to load this cartridge with IMR 7828 I cannot imagine. Make sure the target is far enough away so that if the bullet bounces off, it will fall to the ground before it reaches you.

You’re saying this is a Wiley coyote load!

 

[Slamfire]

You’re saying this is a Wiley coyote load!

I was making fun of it.



With such an inappropriate combination of cartridge and slow burning powder, do shoot on paper and make sure there is a hole for every shot. If a hole does not appear, look down the barrel for a stuck bullet.