6.5-284 Norma Load using imr-7828ssc

[bigmo101]

I have a question about a max load using imr-7828ssc.

I'm using 140 amax, COL is 3.056 and that puts it in the lands of the barrel.
Federal 210m primers 6.5-284 Norma.

I'm currently shooting 49.5 gr of IMR-7828ssc and getting great accuracy and about 2775 fps. The goal is 3000 fps if possible, the current load is just kind of slowl. I'm also going to try some Ramshot Magnum. Just have a lot of IMR-7828ssc.

Any info will be much appreciated

 

[Boss Hoss]

I am not aware of anyone who uses that powder for the 6.5 x 284. 3000fps is not a smart thing to do because pressure will get you before you get there. You can get close but be prepared to have a stuck bolt on a hot day.

Depends on who built your rifle however most folks I know who compete including myself use H4350 I get 2960fps.

 

[bigmo101]

Boss Hoss,

I do understand that there are powders better suited, but I have 8 lbs of the 7828ssc and would like for the powdwer to be used in the calibers I shoot. I also have a 28" barrel and I thought I saw somewhere that the max load was somewhere in the 53 gr range. I have no problems with my current load, but my wife shot three shots and I shot one shot... the stock was hotter from the sun than the barrel. Accuracy is absolutely awesome, three bullets almost touching at 300 yds. I was just hoping to speed things up a bit. As long is accuracy is good and I gain 125 fps... I'll be happy.

 

[bigmo101]

The fellow who built my rifle is a friend of mine by the name of Charlie Cano out of Scottsdale, AZ. The rifle is built on an actual pre 64 action. The way its set up right now, I'm confident out to almost 1000 yds. I just know the caliber can do more.

 

[sambubba]

You should be able to do 51g easily and work up slowly from there. Another one recommended by John Barsness is H1000. Most of the F-class shooters use H4831 and 4350.

 

[bigmo101]

Thank you, that will work.

 

[royinidaho]

I'd think that in that cartridge with 7828ssc you would run out of capacity before getting into pressure problems. I loaded some in a 270 Win behind the Wildcat 169s and couldn't get enough in to make it worth it.

It would be well if you could get the extra velocity even if the group size increased to 1/2 MOA at your distance.

 

[Bwhittty]

In my opinion H4350 is too fast for this cartridge in a 26" Barrel.

Hodgdons Burn Rate Chart

H4350 - 117
H4831SC - 128
7828SSC - 136

From my experience the 4831SC and even better yet the 7828SSC works real well in a 26" Barrel... Here is a target @ 100 yards. 7 different powder charges.

49.5
49.8
50.1
50.4
50.7
51.0
51.3

He settled on 51 grains. 2875 FPS. Plenty fast enough for this cartridge. 2850-2950 is just perfect for a 6.5-284

 

[gunaddict]

I run 53 grs. 7828 (Not SSC) in my 6.5x284 with 140 Bergers VLDH. 2975fps. Shoots awesome.

 

[tbrice23]

I've tried 7828ssc up to 54.5 gr. at 3049fps in a 24" barrel at 44°.
ES was 10. No pressure signs. Accuracy was ok.

 

[Bwhittty]

I would love to hear more feedback on this from other folks...

 

[Bwhittty]

In my opinion H4350 is too fast for this cartridge in a 26" Barrel.

Hodgdons Burn Rate Chart

H4350 - 117
H4831SC - 128
7828SSC - 136

From my experience the 4831SC and even better yet the 7828SSC works real well in a 26" Barrel... Here is a target @ 100 yards. 7 different powder charges.

49.5
49.8
50.1
50.4
50.7
51.0
51.3

He settled on 51 grains. 2875 FPS. Plenty fast enough for this cartridge. 2850-2950 is just perfect for a 6.5-284

I wasn't real clear on which powder he chose. The target does represent 7828SSC. Those are 140 Bergers as well. I will try and find out how the bullet is seated in relation to the lands.

 

[Wedgy]

IMR7828 is perfect in the 6.5 with the 140 grain bullets as is H1000. I use 49.0 grains of 7828 with a Barnes 127 LRX at 3030 fps, and in the 53 range for the 140 Berger a little over 3,000 as well. I couldn't get near the 3,000 mark with H4350
The H1000 is 57.5 gr with the Berger 140 at 3020. These are with 26" barrels, my 22" gives a little under 2900

 

[Wachsmann]

I've been toying around with the 7828ssc as well. I use it for my cool weather practice load but will be using retumbo for my hunting load. I think I'm running right around 53 grains also. I have very faint ejecton mark on some of the cases but no trouble with bolt lift. Velocity seem to be around the 2925ish out of my rifle. Accuracy is good but as one of the other post stated in warm temps expect a pressure increase unless you keep the load a little lighter than max. I also used this in a 257 weatherby and got good results. I tried H1000 but it just never panned out. H1000 is a temp stable powder though and maybe I did not give it enough work up time. One good thing if your developing a load on 7828ssc it seem you can pretty much pick that stuff up everywhere.