7mm Rem Mag 7977

[cajun]

In my testing it was slow compared to other powders.

 

[just_jon]

Would you be able to run this with RL26?

Piece of cake. Let me know if you need more.

 

[WYOHTF]

Thank you.
Do you think going from the 162 to the 180 will have a noticeable difference at distances?
I will have some 162 left over by the time the barrel gets changed out and I thought about trying some but with powder and primers being hard to find I donno if its worth it.

It may have already been brought up but you could surely use your lighter bullets for barrel break in at a reduced load. And not hurt the throat, using faster powders and non magnum rifle primers.
Just a thought

 

[WYOHTF]

The reason for bringing this up is I have ALOT of faster burning powders which we know work better for lighter bullets.
Saving the Sweet stuff for a load after break-in
Especially during these primer/powder pandemic times

 

[CoachChris]

In the testing that I have done the IMR powders 4955,7977 and 8133 in different applications all pressured out at 100-150fps slower than other powders with similar applications.

I switched to 7977 from H1000 in my 300wm running 215 Hybrids. I lost 96fps
Accuracy is still great though!

 

[wird06]

Im all about the accuracy, being as i am punching paper i should be ok. The farthest i can shoot currently is 1400 yards so i plan to tackle that hurdle first.

 

[TXTrained]

Im all about the accuracy, being as i am punching paper i should be ok. The farthest i can shoot currently is 1400 yards so i plan to tackle that hurdle first.

I'm just now shooting solid groups at 600 yards.What kind of groups do you get at 1400 yards? Just curious to know what is good.Thanks

 

[Canhunter35]

I use h1000 with 180hybrids, works well.
If ur shooting targets from 1000-1400 yds u should consider the 197smk. That is one consistent wind beating long range bullet
I used it with retumbo in my 8twist 28" tube and the accuracy was at 2920mv

 

[wird06]

I havent had a chance to shoot the full 1400.I am hoping after rebarrling and a new stock I can make this happen.

 

[wird06]

I wanted to go with the 180 as the BC is stated to be higher and i can pick them up off the shelf locally.

 

[Bobcape]

Hodgdon's website lists some data for 7977 and the 180s.

Bob

 

[wird06]

So I have an update. I finally got a very short window to shoot my OCW with 162 ELDX and 7977. I loaded everything at 0.020 off the lands as this is what my previous barrel liked and I needed a standard for depth. This has been done with brand new brass that as been run though my FL die to get the necks consistent.This is the first time I have shot this gun prior to a few rounds for break in and everything was done at 100yards on the targets shown.
My understanding would be I need to stick with the 69.5 charge as 69.2-69.8 seems to have the same POI and group size. I can mess with setting depth next, according to the books 69.5 of 7977 is max charge but I didn't see any pressure signs or hard bolt lift. What are your thoughts?

 

[WYOHTF]

Was there a lower velocity node that was accurate .

 

[wird06]

Here are my average velocities, I don't know how the explan the average up and down at 68.6 @ 69.8
68.0- 2905
68.3- 2931
68.6- 2909
68.9- 2939
69.2- 2984
69.5- 2981
69.8- 2970