Slow Model 700 7mm Rem Mag?

[baldhunter]

Just a blast from the past on the 7mag.Not too many powders to work with those days and loaded a bit hotter too.The 4831 listed was the original military H4831.The IMR4831 had not been developed yet.IMR4350 was used a lot and surprisingly even powders as fast as IMR4064.
This is from the Lyman 44th 1967.Rifle used was a Savage 110 with a 24" barrel.


This is from the Lyman 45th 1970.Rifle used was a Universal Receiver 26" barrel

 

[Remhunter]

Depending on your charge weight for the H1000, that is pretty spot on IMO. In my 26" Model 70, my pet load is 64 grains of IMR7828 seated ten thousandths off the lands, with a 215M primer. That chrono's out at 2,920fps.

 

[JiggyIi]

I had a post on here about the 280 REM & 7 REM Mag running slow with listed Max loads.
Apparently this is common among these two.
I've been told to just keep adding powder & watch for pressure signs & groups.
I've had three 7 mags run slow no matter what loads combos. I've been reloading for 40 years.
To see a magnum only doing what the Grand ol' 06 does is Depressing

 

[ButterBean]

Trying to help a friend, he recently shot a hand load with 60gr of IMR 4350 under a 160gr Partition with another persons chrono and was in the high 2600's for velocity, I thought that the chrono he used was faulty so today we loaded the same load, all reloading techniques were solid and chronoed them using my V3 and all were between 2675 and 2715. He also shot some with H1000 up to pressure and only got to 2800. Not sure what to think, any help is greatly appreciated.

I'm thinking a powder change is in order

 

[baldhunter]

Here is some load data from Hodgdon

Reloading Data Center

www.hodgdonreloading.com

 

[Chas1]

Try newer lot of powder and different powders.

 

[Philward]

Was just doing some testing with 168 ABLR. Rifle is Browning xbolt hell canyon LR in 7RM. previously shooting IMR4831 at 3003 vel, shot pressure and velocity ladder with IMR4955, 7828ssc, 7977, since didn't have any more IMR4831. And we were just starting to use Peterson brass. 62-64.5 using 4955 with velocities of 2940-3079 with a little stiff bolt at last 2 charges. 7828ssc was 63-65.5 with velocities 2850-2982. 7977 66.5-69 grains was 2855-2989 velocity. 7828 group was tighter than the rest and 4955 the largest. Never got tight bolt lift with 7828 or 7977. This was with virgin Peterson brass and Rem 9.5m primers. I could hear and feel kernels crunching when seating bullets with 7977 powder.

 

[Sockeye66]

When you say he also shot some with H1000 up to pressure do you have the grains of powder he used ?

I'll ask him and reply, I do know he was using Sig brass and an older lot of cci 250's and jumping .030.

 

[donyst]

what would you guys say the shelf life is for powder that has never been opened, It is stored in a cool, dark, dry safe. I have a pound of H4831 its at least 40 years old

0 yrs. old

 

[cdherman]

what would you guys say the shelf life is for powder that has never been opened, It is stored in a cool, dark, dry safe. I have a pound of H4831 its at least 40 years oldView attachment 4631620 yrs. old

In a modern plastic bottle, hard to tell, but I am less optimistic about those old cardboard and foil canisters. Why did they not use the "whiskey flask" style? I have about 5 of those cherished versions. I think they were IMR vintage -- repainted to flat black years ago, they are my go to for smaller lots of left over powder. I would not use it to get into ultra precision shooting. Load some practice or break-in ammo with it. That's what I use my 1980's powder for, till the bottle gets kind of low and then I use the rest as fertilizer.

Aside: early reloading days, my dealer would weight out a lb of powder and throw it into a brown paper bag. Lunch variety. Much cheaper, like $5 in the 80's. You saved up the old cans for your next bulk powder purchase......

 

[Rflshootr]

what would you guys say the shelf life is for powder that has never been opened, It is stored in a cool, dark, dry safe. I have a pound of H4831 its at least 40 years oldView attachment 4631620 yrs. old

Open it. If it smells ok and doesn't have any rust colored dust, use it.

 

[ButterBean]

what would you guys say the shelf life is for powder that has never been opened, It is stored in a cool, dark, dry safe. I have a pound of H4831 its at least 40 years oldView attachment 4631620 yrs. old

If it aint clumpy and smells good Let Her Eat

 

[jbur13]

If it aint clumpy and smells good Let Her Eat

what happens if its clumpy? I have Retumbo that had some clumps so I mixed it up with a spoon again before reloading. Seemed to perform okay for me.

 

[ButterBean]

what happens if its clumpy? I have Retumbo that had some clumps so I mixed it up with a spoon again before reloading. Seemed to perform okay for me.

If it's clumpy it's already started turning bad from moisture