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Ramshot Grand Powder

Ron Gorski

Silver $$ Contributor
In the 2024 Hodgdon manual they list Grand data for most cartridges. In the 2025 manual the Grand data is removed.
Does anyone know why?
I tested some 7 prc loads yesterday using Hornady and Nosler brass with 190 Atips and 69.5 gr of Grand. 69.6 gr is max in the 2024 manual. Well. The velocity was way over what was listed in the manual and I had gas leakage around the primers, hard bolt lift and one primer pushed out of the case for both types of brass. Needless to say, the cases were ruined with the primer pockets being enlarged. The groups were great!
Today I sent an email to Hodgdon asking about the data removal.
Has anyone had any problems with Grand and over pressure? Has there been a recall for Grand? Has it been discontinued?
I haven't found any info on the net.
 
Probably because they tested it last yr and not this yr when it comes to the annual manual, the only "permanent" manual they publish is online, and it isn't a bad idea to print off what you are using in order to CYA if they made a mistake in that data. Not the first time that's happened, had it happen in printed manuals, and online stuff, things changed, or it's listed for the wrong cartridge. Used to be they sent out warnings on that, or posted them on the webpage, but, they don't always do that, which could be a comms problem between them and the data punchers these days.
 
People do not realise that the seating depth and in/out of lands can make a HUGE difference in pressures.

Additional, you should ALWAYS, ALWAYS start considerably lower than the listed loads. One reason is some barrels are "tighter" than others and this can increase pressures. As Mike said -- you MUST be conservative with a new load. Only dropping 0.1 grain is not wise -- particularly considering your measurement might have been off by that much or more.

Also... if you saw that kind of pressure even with two (2) rounds you should have stopped!
 
Last edited:
Started to high of powder charge.
Grand data is on there website at hodgdon reloading data.very easy to use

Your not going to be able to run it that hard in your chamber.
Yeah seating depth also can make a big difference.you might be jammed in lands and not realize it
 
Last edited:
209jones said:
Probably because they tested it last yr and not this yr when it comes to the annual manual, the only "permanent" manual they publish is online, and it isn't a bad idea to print off what you are using in order to CYA if they made a mistake in that data. Not the first time that's happened, had it happen in printed manuals, and online stuff, things changed, or it's listed for the wrong cartridge. Used to be they sent out warnings on that, or posted them on the webpage, but, they don't always do that, which could be a comms problem between them and the data punchers these days.
Click to expand...
If they went through the trouble of testing Grand for the 2024 manual, why would they remove the data from all the cartridges in 2025. That means they should remove the data for all other powders also.
 
precision1 said:
Started to high of powder charge.
Grand data is on there website at hodgdon reloading data.very easy to use

Your not going to be able to run it that hard in your chamber.
Yeah seating depth also can make a big difference.you might be jammed in lands and not realize it
Click to expand...
seating depth is 0.040" off the lands.
 
"If they went through the trouble of testing Grand for the 2024 manual, why would they remove the data from all the cartridges in 2025. That means they should remove the data for all other powders also."


Because the annual manual is not their full reloading manual, it's a highlight manual of the new bullet or powder tests they did in that cartridge, not a printout of all the data on the website.
 
Ron Gorski said:
In the 2024 Hodgdon manual they list Grand data for most cartridges. In the 2025 manual the Grand data is removed.
Does anyone know why?
I tested some 7 prc loads yesterday using Hornady and Nosler brass with 190 Atips and 69.5 gr of Grand. 69.6 gr is max in the 2024 manual. Well. The velocity was way over what was listed in the manual and I had gas leakage around the primers, hard bolt lift and one primer pushed out of the case for both types of brass. Needless to say, the cases were ruined with the primer pockets being enlarged. The groups were great!
Today I sent an email to Hodgdon asking about the data removal.
Has anyone had any problems with Grand and over pressure? Has there been a recall for Grand? Has it been discontinued?
I haven't found any info on the net.
Click to expand...
Something was sure different between the 2 outtings. Temperature, different lot of powder, seating depth, etc.
 
Ron Gorski said:
85-90 both times
Click to expand...
Just leaves powder scale and checking with check weights

Then start over with finding max pressure starting at least two grains below max then start.

Did you open new lb. Of powder?
Also running right up to highest powder charge what are you looking for?
You probably need to start load development all over.look for something two grains below max and up.

Have you done any load development?
 
Last edited:
precision1 said:
Just leaves powder scale and checking with check weights

Then start over with finding max pressure starting at least two grains below max then start.

Did you open new lb. Of powder?
Also running right up to highest powder charge what are you looking for?
You probably need to start load development all over.look for something two grains below max and up.

Have you done any load development?
Click to expand...
scale is ok and same pound of powder. I loaded some new cartridges starting much lower than what I was shooting. I started 2.5 gr below max.
 
So if you stopped at 69.5 with ruined brass.id start over pressure test.

If your concerned about powder try another powder.....

You got to make sure you don't have headspace issue and or bad lb of powder.take measurements


If your dead set in grand powder a problem try something else
 
I'm 1.3grns below max, in a 7mm remington magnum with 180 Berger hybrids, throated long, 3.510" on the lands, I'm loading 3.495" I get 3130fps with 72.2grns, they show 2997fps I believe, with 73.5 and a 3.290" oal, and my barrel is only 3" longer. I'm not seeing pressure and have been to 73grns with no issue, I'm sure I could go 73.5 safely, but for a lighter hunting rifle shooting in the .3s, it's fast enough, but I started at 68.5, start lower, especially if it's a new unfamiliar powder.
 
All my buddies call me all the time with these similar issues.lmao


I'm thinking oh no what have you done now every time they go to the range.uhgaaa

I hate for a few of my friends to go shooting.my wife even says did so and so go shooting when my phone rings.....she just rolls her eyes says you need to start charging these people something.lol
 
I love that stuff in my 22 Creedmoor,46grs Alpha brass pushing Berger 85.5-grain bullets 3900 FPS 26"bbl Zero pressure signs.
 
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